A little slice of Japan and its aesthetics in London's Holland Park.

A hands-off space for graffiti artists to hone and display their skills.

Catacombs turned marketplace.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

A perfectly circular lake is formed by the crater of an ancient underwater volcano.

Jail from the 19th century that was built by inmates.

This propitious plastic porcine has been petitioning park visitors to pick up after themselves for more than 50 years.

This statue honors the author's groundbreaking family story.

One of the oldest active carousels in the country—but it might be missed by all but the keenest-eyed boardwalk strollers.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

The land is home to swimming ponies and a legendary 18th-century treasure.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

There aren't too many operational funiculars around, but Pittsburgh has two!

This restaurant offers a side of antiques, curios, and a bathroom chock full of owls.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

World's first "penitentiary," meant to be humane, drove men insane.

Europe's oldest still-operational tea farm also boasts a spectacular view.

This abandoned five-star hotel is now a five-star urban exploration destination.

This fairy-tale, neo-Gothic church in the Azores is a world of magical realism.

The celebrated eyesore created by starry-eyed sweethearts.

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