This mysterious, medieval cathedral remains unbuilt but fiercely protected.

A brilliant turquoise lake in the mountains.

An entertainment center in a huge transparent tent.

This retro, UFO-like structure is a remnant of the Soviet-era circus.

Ruins of a former government building destroyed during the Georgian-Abkhaz war in the wake of the fall of the Soviet Union.

The building's fluid, wavelike walls are a true feat of architectural ingenuity.

This isolated structure beckons adventurers with sublime views of the Faroe Islands.

Locals spent years successfully fighting to save this beloved Brutalist behemoth from demolition.

The last planned Soviet city was built for the former residents of Prypiat after the Chornobyl disaster.