This abandoned secret city is a crumbling wonderland of Soviet ruins.

A top secret Cold War bunker hidden beneath a Latvian spa facility is now open for tours.

The last standing example of an ancient district's teatime tradition.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

This sublime architectural marvel is a rare example of an expressionist church.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

One of the largest collections of socialist realist art shows the surprising depth of the official art of the Soviet Union.

A celebration of all things tacky, garish, and bizarrely creative in the Romanian capital.

This harsh mountain path was built as a strange attempt to improve the health of Turkmen citizens.

This 3,800-year-old site contains markers used to study the movement of the sun and moon and create a lunar calendar.

The oldest Roman lighthouse still in use.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

Nicknamed Kazakhstan's Grand Canyon, this natural wonder lies east of Almaty near the Chinese border.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Monasteries on rock pillars, once accessible only by frayed ropes.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

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

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Northern Ireland's Brobdingnagian stepping stones.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."