Stunning examples of Russia's 18th-century wooden architecture.

A cathedral resurrected from the ashes of one of Europe's greatest urban fires.

Crawling into this primordial cave may feel disconcertingly familiar.

Villas that once served as playgrounds for the rich now fall away in decay.

This lake-bound geographical marker sits at the point where three European countries intersect.

Legend has this precariously placed rock was placed by giants. Science has another explanation.

A subterranean house of worship carved right out of the bedrock.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

This fantastical icy castle is built anew every winter.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

Polish luminaries and masterful folk art find sanctuary in this unique cemetery.

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

This uber-quaint Polish village is known for its habit of painting elaborate floral motifs on just about everything.

The world’s narrowest house makes for an awkward, four-foot-wide living space.

Warsaw's fantastically preserved gasworks...almost.

Museum dedicated to "the man who moved the Earth."

Disturbing works of outsider art, carved from whole logs.

This historic Idaho island is home to a strange timeshare museum, a homemade mini-golf course, and an outhouse named Aunt Fanny.

A museum dedicated to the history and art of staying clean.

The mayor made the declaration in 2004.

A wild west land agreement was etched right onto this historic Idaho stone.

These black pillars of volcanic basalt seem to call mountain climbers with an unbreakable siren song.

A former gold rush boomtown has managed to stay in business for over 100 ramshackle years.