A little-visited waterfall in an otherworldly landscape.

Ancient human, animal, and geometric figures drawn in the earth.

The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

A lecture hall sink once used by Einstein and other noted physicists is now regarded as a strange science relic.

Drive past the giant fruit sculptures and up to the window for a menu of fruity treats.

Europe's official "zero-level," the equator of elevation.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

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

Paris' linguistic guide to the international language of, yes, love.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

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

A haunting collection of the vanished and disappearing natural world.

This demon atop the Notre-Dame de Paris looks utterly bored.

The celebrated eyesore created by starry-eyed sweethearts.

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

The narrowest street in Paris.

The recovered bones of martyrs slaughtered during The Terror are on display in this church crypt.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.