This ancient structure appears Roman, but was constructed during the 16th century and was utilized until 1911.

This black sand beach was crafted from volcanic explosions including the historic Minoan eruption.

The ancient latrines of the Greeks, in all their public glory.

Roman ruins top white travertine terraces formed by ancient hot springs.

This famous city eluded concrete detection until the early 2000's.

Ancient serpentine sacrifice holder that has stood the test of time.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

In a long-dry lake bed, these groups of massive stone pillars bear a striking resemblance to clumps of everyone's favorite fungi.

An abandoned saucer-shaped monument in the Bulgarian mountains.

A mountain pass in Bulgaria's Balkan Mountains was the site of four historic battles.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

340-foot statue built to honour the Heroes of the Soviet Union.

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

The deepest metro station in the world.

When you've got to go, you've got to go.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This attraction was abandoned after the Chornobyl disaster.

This derelict superstructure was a very important warning system for the Soviet military.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.