No one knows who built this strange cave of worship or exactly why.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

A giant portrait of an ancient king looms over the river.

The romantic botanic tunnel feels like a well-kept secret.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

This massive underground salt mine now holds a sci-fi theme park in its depths.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

Moss and stone turn this waterfall into an otherworldly liquid veil.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

A countryside Romanian cemetery filled with colorful crosses bearing lyrical, ironic, or satirical rhymes.

A unique collection of Soviet military artifacts lies hidden away in a disused train, in the unrecognized Eastern European republic of Transnistria.

The largest wine cellar in the world is a 150-mile network of underground caves near the capital of Moldova.

Like something out of a bad acid trip, this Ukraine hallway has been covered in hallucinatory phantasmagoria.

A huge Soviet-era robotics factory in the outskirts of Pripyat, now long-abandoned.

A unique Soviet mosaic preserved on the facade of a shoe factory in Lviv.

Built in the Soviet era, this cableway system still runs gondolas from Odessa down to Otrada Beach.

The eerie burnt-out remains of a prominent building where 30 protestors lost their lives.

A beautiful art space and unusual mini-hotel hidden in the city center of Dnipro.

Last remaining nuclear missile base in Ukraine.

A century-old church is now a space museum with a treasure trove of Soviet space items.

The largest park in Lviv is surrounded by a network of disused rail tracks.

This cheeky restaurant has a serious devotion to lard sculptures.

Remains of a station that only operated for one year.