The rocks are a time capsule of a 407-million-year-old Earth.

Home to what was once considered the largest gate in central Asia.

The heartbeat of modern Uzbekistan’s thriving market culture.

Created as a "model concentration camp" to hide Nazi atrocities from the international community, this former camp-ghetto now holds a museum and memorial honoring the lives lost within.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Two nations form a rare four-sided border at the peak of a mountain, philosophical questions result.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

A subterranean Holocaust refuge within one of the world's longest cave systems.

The oldest private art gallery in all of Hungary.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

This towering statue of Jesus provided internet to the surrounding area.

A mysterious emblem tucked in an small alleyway is actually the coat of arms of a heroic medieval family.

There are thousands of tributes and memorials to the King, but none quite like this one in a Kraków city park.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

Seventy-five miles of limestone caves host more than a million bottles of wine beneath a sleepy Moldovan town.

At less than four inches in height, this iconic fictional character is the smallest public statue in all of Moldova.

A muddy alien landscape that is home to rare species of exotic plants.

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

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

A dormant lightning machine equal to all the power in Russia.

Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

A spectacular Bulgarian cave resembling a devil's head with a waterfall rushing down its throat.