A cylinder monument with a spectacular vista commemorates a friendship that some say never existed.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

Hidden up a dusty track off the Georgian Military Road is this fascinating waterfall with mountainous views.

Each year melting snow turns these Austrian hiking trails into scuba zones.

A collection of items from a way of life that no longer exists.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

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

Lonely minaret stump of a destroyed city.

An outstanding piece of retro Sci-Fi architecture built into a sacred mountain.

One of the most ethnically diverse spots on the planet.

Final palace complex of the last of 29 Kokand rulers.

Ancient barriers wrap around what was once an important stop along the Silk Road.

Light still pours into the ruins of this ancient Islamic observatory.

The Avenue of Mausolea is a series of grand palatial tombs.

A fiery crater has been burning in the Karakum Desert since 1971.

If you want to get married in the White Marble City of Ashgabat, you should do it in this surreal disco ball building.

Witness traditional silk production in the Uzbek city that's been a hub of sericulture for over a thousand years.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

Marvel at the excessive luxury of the ousted Ukrainian president's former estate.

One of the most poignant ruins of the Chornobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

This attraction was abandoned after the Chornobyl disaster.