Top 10 Most Renowned Forgotten Cities in the World

Tiwanaku is an ancient city near Lake Titicaca in Bolivia. It served as a significant cultural hub in the Inca Empire from the 7th to the 9th century. Archaeologists estimate that the city once supported a population of 15,000 to 30,000 people. However, by the year 1000 AD, climate shifts severely impacted agricultural production, leading to the city's decline and eventual abandonment. In 2000, Tiwanaku was designated a UNESCO World Heritage Site.

Tiwanaku became a major political and ceremonial center in the southeastern region of the Titicaca Basin. Its capital was located at a high-altitude site between the Tiwanaku and Katari rivers, ranging from 3,800 to 4,200 meters above sea level. Despite its challenging location with frequent frost and thin soils, it is believed that as many as 20,000 to 40,000 people once thrived here during its peak. Artifacts and architectural remnants in the Tiwanaku style have been found throughout the central Andes. The basin where Tiwanaku was built is prone to seasonal flooding, fed by the melting snow of the Quelccaya ice cap.

Teotihuacan is an enigmatic forgotten city located near Mexico City. To this day, the identity of its builders and the reasons for its abandonment remain a mystery. The name Teotihuacan, meaning "Place of the Gods", was coined after the city had been deserted for centuries (around 550 AD). Spanning roughly 20 square kilometers, the city features impressive pyramids, with the Pyramid of the Sun and Pyramid of the Moon being two of the most iconic in the world. In 1987, UNESCO designated Teotihuacan as a World Heritage Site.

Teotihuacan was first settled as early as 400 BC and became a powerful, influential city by 400 AD. When the Aztecs discovered the site in the 1400s, the city had already been abandoned for many centuries. Much of Teotihuacan's origin, history, and culture remain shrouded in mystery. The city's main buildings are connected by the Avenue of the Dead (or Micotil, in the Aztec Nahuatl language), a 40-meter-wide, 2.4-kilometer-long road that runs slightly eastward (15.5 degrees) from true north, leading to the sacred peak of Cerro Gordo, a dormant volcano. The city boasts several key architectural structures: the Pyramid of the Moon, the Pyramid of the Sun, the Ciudadela, and the Temple of Quetzalcoatl.

Tikal is an ancient Maya city nestled in the rainforests of Guatemala. Once the capital of a powerful kingdom, Tikal flourished and became a prominent center of Maya civilization. Among its most remarkable features is the Great Jaguar Temple, one of the most famous pyramids in the world. By the 4th century AD, Tikal was invaded by Teotihuacan and gradually declined, eventually fading into obscurity by the 10th century. Today, Tikal is one of the largest archaeological sites in the world and was designated a UNESCO World Heritage Site in 1979.

The peak of Tikal's influence saw the development of grand plazas, pyramids, and palaces, alongside the use of Maya hieroglyphic writing, complex timekeeping systems, and a flourishing of Maya art, visible in its magnificent sculptures and murals. Tikal was a key player in a vast trade network that reached as far as central Mexico. Between 600 and 800 AD, the city reached its architectural and artistic zenith, but by the end of the 8th century, it began to decline, marked by a population decrease and a general collapse of the artistic culture.

Petra was the ancient capital of the Nabataean Kingdom, an Arab state during the Greek and Roman periods, located in the southwest of Jordan. The city was built on a plateau, with the Moses Valley cutting through it from east to west. The valley is surrounded by multi-colored sandstone cliffs ranging from red and purple to pale yellow, which is why the 19th-century British biblical scholar John William Burgon referred to Petra as 'The Rose-Red City, Half as Old as Time.' Evidence of both the Paleolithic and Neolithic eras has been found here, and the Edomites are known to have occupied the area around 1200 BC.

Although the exact founding date is unclear, some historians believe that Petra was established around 312 BC and thrived for a long period as a crucial crossroads for trade routes, including the Silk Road and the Spice Route, connecting the East and West. The city's most striking features are its monumental buildings carved directly into the rock. In the 6th century AD, several earthquakes caused severe damage, depleting the city's water supply and leading to its decline and eventual abandonment. Petra remained lost to the Western world until 1812, when it was rediscovered. In 1895, Petra was recognized by UNESCO as a World Heritage Site. In 2007, it was named one of the New Seven Wonders of the World and was featured in Smithsonian Magazine’s list of '28 Places to Visit Before You Die.'

The history of Pompeii is perhaps the most striking on this list. Pompeii was an ancient Roman city that met a tragic fate in 79 AD when Mount Vesuvius, one of the world's most active volcanoes, erupted violently, burying both Pompeii and the neighboring city of Herculaneum under a blanket of lava, ash, and debris, killing all its inhabitants. The cities were lost to history until the 18th century, when archaeologists began excavating Pompeii. In 1748, explorers were astonished to find that, beneath the layers of dust and rubble, Pompeii had remained largely intact. Since then, it has become a major tourist destination, offering visitors a glimpse into life nearly 2,000 years ago. In 1997, Pompeii was recognized as a UNESCO World Heritage Site.

Elegant homes and intricately decorated villas line the cobbled streets of Pompeii. Tourists, townspeople, and slaves bustled in and out of small factories, shops, taverns, cafes, brothels, and baths. People gathered in the 20,000-seat amphitheater or relaxed in the open-air squares and markets. On the eve of the fateful eruption in 79 AD, scholars estimate that around 12,000 people lived in Pompeii, with many more in the surrounding area. Today, the excavation of Pompeii has been ongoing for nearly three centuries, and scholars and visitors alike continue to be fascinated by the strange and preserved ruins of the city as they were discovered in the 18th century.

Angkor was once the thriving capital of the Khmer Empire, flourishing from the 9th to the 15th centuries, with Angkor Wat standing as the largest religious temple in the world. By the 15th century, however, the city began to decline due to internal rebellions, invasions, and plundering. The inhabitants gradually migrated elsewhere, leaving Angkor to be forgotten. Modern archaeological methods have confirmed that Angkor was the largest pre-industrial city ever built. While much of the city is in ruins, Angkor Wat remains as Cambodia's premier tourist destination and a national symbol, proudly featured on the country’s flag.

Though Angkor fell into disrepair over time, it still remains an unparalleled architectural marvel. In the 1840s, French explorer Henri Mouhot rediscovered it, describing it as “greater than anything left to us by Greece or Rome.” The five towers of Angkor Wat symbolize the five peaks of Mount Meru, while its surrounding walls and moat represent nearby mountains and seas. During its construction, the Khmer Empire developed a unique architectural style, with sandstone as the primary building material. The city was enclosed by a 4.6-meter-high wall, surrounded by a vast protective moat.

Machu Picchu, often called the 'Lost City of the Incas,' is the most famous Incan site in the world and a symbol of the Inca civilization. Built in the 15th century during the peak of the Inca Empire, it sits on a 2,430-meter high mountain, approximately 80 kilometers southwest of Cusco, Peru. The city was constructed in the traditional Incan style, using finely cut stone walls that include palaces, temples, and various other structures. After the Spanish invasion, the city was abandoned and remained forgotten until American historian Hiram Bingham rediscovered it in 1911, bringing it into global prominence. In 1983, Machu Picchu was designated a UNESCO World Heritage site and was later named one of the New Seven Wonders of the World.

Machu Picchu is a renowned archaeological site located in the Andes Mountains of Peru, South America, attracting over a million visitors annually in recent years. Its name, meaning 'Old Mountain' in the Quechua language, refers to the peak it sits atop. The Inca Empire, which thrived in South America over 600 years ago, built this remarkable site by leveling the ground between two mountain peaks. The buildings were constructed with deep foundations and employed crushed stone for drainage. Remarkably, the Inca did not use mortar to hold the stone walls together. Instead, they precisely carved and interlocked each stone, ensuring the city's preservation for over six centuries.

Unlike other cities on this list, Atlantis has never been found, and most historians agree that it likely never existed. Mentioned in numerous ancient texts, Atlantis was said to be an incredibly prosperous city, even covered in gold, that sank into the sea after a volcanic eruption. For centuries, explorers have searched for this mysterious city, which has been the subject of many films and legends. Yet, the existence of Atlantis remains an enduring mystery.

It is believed that the eruption of the Minoan volcano on the island triggered the downfall of the mythical city of Atlantis. Atlantis was said to be the home of the mythological god Zeus, his mortal wife, and their ten children. According to legend, after the city was conquered by the Athenians, it lost its former glory. In an effort to preserve what was left, Zeus and the other gods drowned the entire island by causing a massive earthquake and flood, which swallowed the city forever. The volcanic eruption, marked by various mudflows and enormous lava eruptions, is thought to have submerged Atlantis. Santorini Caldera is one such location that some believe could be where Atlantis was lost to the sea. Today, the Santorini crater is one of the most significant geological features on Earth, and it continues to be the focus of intense archaeological and geological study.

For centuries, Troy was thought to be nothing more than a myth, a fictional creation from Homer's epic poetry about the Trojan War, a city that never existed. However, in 1860, the real city of Troy was discovered in northwest Anatolia, Turkey. Archaeologists' findings reveal that during the Byzantine period, Troy was built and destroyed multiple times before it was abandoned. In 1988, the site of Troy was designated as a UNESCO World Heritage Site.

This ancient city in northwest Anatolia holds a lasting significance in both literature and archaeology. Troy was strategically positioned along the trade routes between Europe and Asia. The legendary Trojan War, fought between the Greeks and the Trojans, remains one of the most famous stories in ancient Greek literature. While the true scale and nature of the historical settlement is still debated, the ruins of Troy at Hisarlık, Turkey, provide an important archaeological site with multiple layers that show the gradual development of civilization in northwest Asia Minor. The extensive and complex ruins are open to the public, and a museum on-site offers further insight into the city’s history.

Palenque is the second Mexican site featured in this list and a former Maya city. Located in southern Mexico, Palenque flourished during the 7th century. The city is home to numerous architectural marvels that reflect the Maya style, including pyramids. However, after the collapse of the Maya civilization, the city was abandoned and gradually overtaken by the surrounding jungle. It wasn't until the 19th century that Palenque was rediscovered, sparking renewed interest. Following several excavations and restoration efforts, Palenque became a renowned archaeological site and a popular tourist destination. In 1987, UNESCO recognized it as a World Heritage Site.

The builders of Palenque used stucco to achieve an exceptionally smooth outer finish, unlike the traditional limestone or Maya tools commonly used. Traces of mortar and fired clay have been uncovered. The complex palace compound features three parallel walls and two covered corridors, with pointed vaulted roofs characteristic of Palenque's style. One of the largest and best-preserved structures is the Temple of the Inscriptions, notable for its hieroglyphic inscriptions. In 1952, an underground tomb was discovered beneath the temple, containing the jade-decorated remains of what may have been a 7th-century ruler or priest.