A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

An icy lake tucked among jaw-dropping alpine panoramas.

Pitié-Salpêtrière was the dumping grounds for women who received the dreaded diagnosis of "hysterical."

Ancient paintings known as the "Sistine Chapel of Cave Art."

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.

One of the greatest maze designer’s greatest mazes.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The Old Man of the Mountain’s less-famous, but still beloved little brother is said to resemble a leader of the Abenaki tribe.

An unrecognized nation-state created in the 1820s to avoid taxes.

This centuries-old rooster survived a devastating fire.

Twice a year, this floating library delivers thousands of books to the remote islands of Stockholm’s archipelago.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

A plaque marks the house in Stockholm where the French philosopher René Descartes lived up until his death.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

This chimerical bridge/tunnel appears to dead end right into the sea.

This cobblestoned medieval-style town was entirely constructed in the 1990s and 2000s.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

20-foot tall lamp mumbles Swedish to celebrate the holidays.

The world's largest underground iron ore mine.

This abandoned urban warfare facility is a dream come true for airsoft and paintball enthusiasts.

This serene wooded hilltop has a dark history as the climactic point of the Swedish witch trials.