This museum is dedicated solely to this millennia-old handheld cooling device.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

This ruined castle is said to be the legendary keep of a Viking princess.

This miniature take on the Kremlin is one Dutch man's retirement project.

Colorful and chaotic stacked hotel in North Holland.

This cheese shop also houses a museum devoted to Dutch dairy.

Europe's first floating restaurant is home to a hilarious legend.

Where royalty waits in the height of luxury.

A rare tour of an aristocrat's private home reveals valuable 17th-century paintings from artists like Rembrandt.

A beautifully eclectic mix of architectural styles.

A line number in Amsterdam that will likely never be used again due to its tragic history.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

A discarded movie prop that was the original monolith for "2001: A Space Odyssey."

Under the right conditions, rocks will move across this dry lakebed, leaving trails behind them.

An odd museum dedicated to French fakes.

The narrowest street in Paris.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

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

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

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

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

This frog-themed restaurant was frequented by Picasso, Saint-Exupéry, and more.