A legend describing the remains of an ancient fortress hidden under the picturesque waters of Turkey's Lake Van has been declared completely true.

Archeologists from Van Yüzüncü Yıl University have discovered the preserved remains of a castle dating back more than 3,000 years to the Iron Age under the Urartu civilization.

Lake Van, rich in history from settlements dating back thousands of years, is the world's largest sodium lake. Lake Van, rich in history from settlements dating back thousands of years, is the world's largest sodium lake. (Photo: gozturk/Wikimedia Commons)

"There was a rumor that there might be something under the water, but most archaeologists and museum officials told us that we won't find anything," Tahsin Ceylan, head of the dive team, told the Turkish Daily Saba. Instead, Ceylan and his team ended up uncovering a massive fortress spanning a kilometer over the lakebed.

"Since the water of Lake Van is alkaline, the castle has not been damaged and has kept its characteristics underwater," Ceyland added to the Hurriyet Daily News, referencing Van's distinction as the largest sodium lake in the world. "We have detected the castle’s exact location and photographed it and have made progress in our research. We now believe we have discovered a new area for archaeologists and historians to study."

As shown in the video below, the fortress appears remarkably well preserved, with mortared rocks giving way to perfectly cut, smooth stone walls. Visible sections span some 9 to 14 feet, with much of the rest buried under sediment.

A boon to archaeology and tourism

Lake Van has been subjected to dramatic rises and falls in water levels throughout much of its history. During the Ice Age, the lake was more than 200 feet above its present level, while some 9,500 years ago it was nearly 1,000 feet lower. Because the lake has no outlet, it is rich in sediment, with some layers estimated to be more than 1,300 feet. This makes it extremely interesting to climate scientists, who estimate these sediments may contain the preserved climate history of the last 800,000 years.

According to Ceyland, the discovery of the submerged castle is not only a boon to the archaeological community, but also for tourists interested in learning more about the region's rich history.

"Many civilizations and people had settled around Lake Van," he said. "They named the lake the ‘upper sea’ and believed it had many mysterious things. With this belief in mind, we are working to reveal the lake’s ‘secrets."

Michael d'Estries ( @michaeldestries ) covers science, technology, art, and the beautiful, unusual corners of our incredible world.