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In 2023, Saudi Arabia announced plans for the Mukaab ('cube' in Arabic) in Riyadh, a massive structure that will become the largest urban building globally, with the capacity to house 20 Empire State Buildings within its walls. The design promises to integrate cutting-edge digital and holographic technology, offering an awe-inspiring visual experience inside. This project adds to the growing collection of daring, futuristic architecture in the region, including Dubai’s iconic Burj Khalifa and the revolutionary Museum of the Future with its unique curved design.
Architecture is pushing creative and technological boundaries as it rapidly adapts to meet modern challenges, with sustainability taking center stage due to the escalating climate crisis. Revolutionary ideas are already in development to tackle this and other pressing issues, offering a glimpse into the buildings of tomorrow. The Mukaab and Burj Khalifa are merely the beginning. Visionary architects and engineers are dreaming up more incredible forms and functions. This list explores ten such innovative concepts.
10. Floating Metropolis
With climate change causing rising sea levels, a reality that will heavily impact two out of every five people living within 60 miles (100 km) of coastlines, the idea of sustainable floating cities has emerged. These cities would adapt to water, rather than fighting it, by being self-sufficient, producing their own food, energy, and fresh water. These cities would operate on zero-waste, closed-loop (recyclable) systems, making them a possible solution to future environmental challenges.
The engineering obstacles are challenging but not insurmountable. Ensuring the city’s stability, anchoring, and resistance to waves and storms must be the top priority. Advanced anchoring methods and dynamic positioning technologies are currently under development. With their extensive expertise in working with the sea, the Dutch are leading the way in making this vision a reality. Architect Koen Olthuis is designing a floating city for the Maldives, a nation particularly vulnerable to rising sea levels. His design will consist of floating sections inspired by the coral reefs that surround the area.
Expanding on this concept, Danish architect Bjarke Ingels envisions floating modules, each covering 4.9 acres (2 hectares), anchored to the ocean floor. These modules can be detached and moved to calmer waters during storms. This concept forms the basis of the world’s first prototype sustainable floating city, Oceanix Busan, set to be built near Busan, South Korea. Initially, it will house a community of 12,000 people with low-rise buildings and lively public spaces on each platform. The city’s interconnected systems for food, water, and energy will operate in a closed-loop, allowing it to be completely self-sustaining. The city can grow as needed, with the potential to accommodate 100,000 residents.
9. Floating Homes
Filipino architect Lira Luis grew up in a flood-prone village, a common experience in many parts of the Philippines during typhoon season. During a project involving underwater magnets, she had the idea of using magnetic levitation to keep homes above water. Magnetic levitation, already used for trains, could potentially be applied to buildings. Luis built a small-scale model weighing 13 ounces (368.5 grams), which floated 1.5 inches (3.81 cm) above the ground. The challenge now lies in scaling up the design, a feat that some skeptics believe is impractical.
Regardless of the outcome of Luis’s experiments, she is not alone in her vision. Technology company Arx Pax, led by Greg Henderson, also dreams of levitating buildings and has already developed hoverboards capable of carrying people. Arx Pax’s Magnetic Field Architecture (MFA) could one day be incorporated into building design, potentially making structures disaster-resistant.
Since lifting houses via magnets might prove complex and expensive and will likely take decades to realize, inventor Shoichi Sakamoto has devised an airlift system to “levitate” houses in earthquake-prone Japan. Within 0.5 to 1 second of detecting a tremor, air from a storage tank fills an expandable, sliding air chamber beneath the house, lifting it from its foundations and off the moving ground. This simple system will have to stand in until MFA actually allows us to literally rise above floods and earthquakes.
8. Flying Houses
In the future, many people might opt to escape rising seas, earthquakes, landslides, and other land-based disasters by leaving the ground altogether and having their homes in the sky. It had already been demonstrated that the premise of Pixar’s animated film Up, a house carried airborne by balloons, is quite possible. But instead of hundreds of balloons, European tech company TELE2 relied on just one big hot-air balloon to carry a prototype tiny home made of wood and successfully flew it over Lithuania. Primitive as it seems, it is just part of a growing trend in airborne architecture.
Architect Chris Lawson envisions flying houses will take on the overall shape and configurations of today’s drones, only 10 times bigger with giant propellers to generate the continuous airflow to keep it up in the air.
In 2012, Swiss designer Timon Sager developed a different concept with his Wolke 7, a twin-hulled airship carrying a gondola/house with multiple decks, clear glass viewing windows, and modern accommodations. The two hulls are separated by rigid structures and have propellers underneath to steer the house. Whatever the final form an airborne house takes, it will be a stunning experience of life in the clouds.
7. Climate Control Tower
In an age of unpredictable weather and extreme climate patterns, a design team from South Korea has introduced the concept of Climate Control Towers (CCTs). These structures are designed to create clouds and mitigate some of the worst impacts of the climate crisis. The CCTs would be placed above the sea, maximizing the use of marine resources for their operation.
Powered by solar energy, the CCT generates heat that is stored in a high-temperature pressure tank connected to a cloud-making system. This heat transforms seawater into vapor, which then flows through a wind pressure generator. The clouds produced are stored in a membrane surrounding the tower. A laboratory within the CCT receives real-time meteorological data from satellites, which helps control the movement of the membrane. This data includes variables like wind direction, speed, and distance, and once optimal conditions are met, the system rotates to release the clouds through a central outlet and directs them to the desired location.
CCTs aim to bring rainfall to regions facing drought and desertification, protect ecosystems, and even help in reforestation efforts.
6. Ice-Making Skyscraper
The Arctic is melting. This is the harsh reality, and humanity is urgently seeking ways to stop or at least delay the impending catastrophe. A proposal by Chinese architects suggests constructing an underwater 'skyscraper' that would freeze seawater in an effort to replenish the ice caps. By reducing the ocean's salinity through reverse osmosis, it becomes easier to freeze the water. Reverse osmosis is already used in desalination plants to convert seawater into drinkable water.
The proposed structure would feature a long tube that extends deep into the ocean to draw in seawater, which would then be filtered through a semipermeable membrane that permits water molecules to pass but blocks salt and other organic substances. After being processed in the reverse osmosis facility, the water is frozen into hexagonal ice floes, each layer 16 feet (5 meters) thick. Underwater robots would then push the floes together, with their natural hexagonal shape simplifying the assembly process.
The ice-producing structure would be powered by solar and wind energy. Above the water, a wind turbine and a domed control room fitted with solar panels would provide energy, while several underwater floors would house observatories and laboratories. Illuminated tentacles would deter marine life, making the entire setup resemble a giant jellyfish.
5. Artificial Mountain
Mountains have long fascinated humanity. From the grandeur of pyramids to the step-like ziggurats, humans have created their own versions of these natural wonders. Legend has it that Nebuchadnezzar II constructed the Hanging Gardens of Babylon for his queen, who yearned for the hills and valleys of her homeland. In the modern industrialized world, we have made artificial mountains out of slag heaps, though they are merely small hills in comparison.
In 2009, German architect Jakob Tigges proposed to build a 3,281-foot (1,000-meter) high mountain on the site of Berlin’s Templelhof Airport. The Berg will be the highest artificial mountain in the world, a natural habitat for surrounding wildlife and, at the same time, a recreational area for city residents. Its peak will be covered with snow from September to March. Unfortunately, this project has been shelved, and Tigges’ vision must remain a fantasy indefinitely.
But mountains offer much more than just a spectacular view. They are rain-making machines. Mountains cause moisture-heavy air to rise until it can no longer hold the weight and dump it as condensed precipitation. The United Arab Emirates wants to take advantage of this rain-making feature and, in 2016, offered a $400,000 grant to the United States National Center for Atmospheric Research (USNCA) to study the feasibility of building an artificial mountain in the country.
This kind of weather modification can be tricky and depends on several variables. The location, width, and height of the mountain must be carefully considered to determine the ideal climate. Whether or not the UAE pushes through with the project, designers and planners will undoubtedly return to the idea of a manmade mountain again and again, and we just might see one somewhere in the world in the near future.
4. Atlantic Tunnel
In 1895, an article titled “Un Express de l’avenir” (An Express of the Future) and credited to Jules Verne appeared in the Strand Magazine, proposing a tunnel beneath the Atlantic to bridge the 3,106-mile (5,000-km) gap between Europe and North America. From this first moment the idea was broached, other visionaries have dreamed of linking the two continents via an undersea tunnel.
Thanks to advances in engineering, the idea of a transatlantic tunnel may soon move from the realm of science fiction to reality. The Channel Tunnel demonstrated that building an even more ambitious and intricate railway system beneath the ocean is possible. This transatlantic tunnel would be built from 54,000 prefabricated tubular sections and secured by cables anchored to the ocean floor. It would float about 50 meters below the surface, utilizing submarine-like buoyancy technology.
The tunnel's sections would consist of two layers of steel, with foam in between to provide protection against high pressures, strong currents, and collisions. An estimated one million tons of steel would be required for construction, equal to the entire annual global steel output. A frictionless Magnetic Levitation (Maglev) train would swiftly transport passengers through the vacuum tunnel, completing the journey from New York to London in just 54 minutes.
Though feasible, the transatlantic tunnel presents significant challenges in terms of safety and cost. The projected $12 trillion price tag for its construction will inevitably affect the cost for travelers seeking to cross the Atlantic at unprecedented speeds.
3. Inverted Skyscraper
An upside-down skyscraper might sound utterly absurd, but that hasn't stopped Dubai from designing some of the most ambitious structures in the world. The Burj Khalifa is just the beginning when compared to Dubai’s daring proposal for the Analemma Tower, which would hang upside down from an asteroid orbiting above the city.
This concept, part of a growing trend to move away from traditional ground-based living, involves capturing an asteroid and placing it in orbit just above Earth. The skyscraper would be suspended by strong cables, allowing it to hover in the sky. This unique structure would also enable the building to travel across the planet, passing over various cities throughout the day. Standing at 105,000 feet (32,000 meters), the Analemma Tower would dwarf the Burj Khalifa. Residents would access their apartments via drones. Solar panels would supply energy, and water could be gathered from nearby clouds.
The Analemma Tower would follow an eccentric geosynchronous orbit, looping daily between the northern and southern hemispheres in a figure-eight pattern. It would slow down at the top and bottom of the loop. The design ensures that the tower's slowest point occurs over New York, giving its residents extra time to explore the city.
2. Oceanscrapers
What should be done with the Great Pacific Garbage Patch, two massive areas of non-biodegradable waste in the ocean, so large they are dubbed the Seventh Continent? Belgian architect Vincent Callebaut proposes recycling this plastic waste to create underwater eco-villages, or ‘oceanscrapers,’ each housing 20,000 people, named Aequorea after the bioluminescent jellyfish species they resemble.
An oceanscraper would spiral down 250 floors, from mangrove forests at the water’s surface to the seabed. Along with living spaces, Aequorea would feature offices, hotels, sports facilities, and all the amenities one would expect on land. Aquaponic farms would provide food, desalinated seawater would offer drinking water, and bioluminescence would provide light. Just like its namesake, the twisting form of the oceanscraper, which is highly resistant to hydrostatic pressure, would keep it stable against strong currents and storms, aided by ballasts in the double shell.
The buildings will be 3D printed using a material called algoplast, which is a combination of algae and waste collected from the Great Pacific Garbage Patch. The goal is to recycle the entire 27 million tons of this debris. From there, an Aequorea continues its self-building process much like a seashell, using natural calcification to fix calcium carbonate from the surrounding water, gradually forming an external skeleton.
1. Tree Skyscrapers
What if the building you work or live in is actually a living organism? Not a high-tech AI, but a structure shaped by nature through genetic engineering. Andrii Lesyuk, a fresh architecture graduate, was inspired when his father introduced him to the paulownia, a genus of angiosperm trees known for being among the fastest-growing hardwoods. These trees can grow as much as 16 feet (5 meters) in a year and reach heights of up to 98 feet (30 meters).
Often referred to as the “aluminum of timber,” paulownia trees are naturally resistant to fire, saltwater, termites, and decay. Lesyuk remarked, “I started thinking, if we could accelerate the growth of these trees, they could grow even taller, and we could shape them however we wanted. With special guideway systems, we might even grow a skyscraper.” If scientists manage to genetically modify these trees to grow 30-40 times faster, it would take just 15 years to cultivate a skyscraper.
As envisioned by Lesyuk and his fellow Ukrainian architects, The Living Skyscraper will consist of trees whose growth and form are carefully controlled to serve as the framework for a high-rise building. Located in Manhattan, it will offer an oasis of greenery amid the city’s concrete landscape, alongside Central Park.
The skyscraper tree will function as a living entity, complete with its own root system, irrigation, and maintenance structures. Fast-growing, tall deciduous trees will be grouped together on specially prepared soil. As the trees grow, they will take on the shape of a skyscraper, with their trunks providing structural support while the branches create additional structural elements. These trees can even spread out to form separate biomorphic structures or connect multiple buildings, extending beyond the length of a city block.
