This community on a small Venetian island has taken to painting their houses in bright neon hues.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

The curiosities and wonders of pharmacy in a delightful historic building.

The longest hedge maze in the world.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

More gold than anywhere else, ever.

Countless grotesque faces stare out from this eerie Prague art wall.

This semi-secret storybook hedge maze is also the oldest garden in the city.

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

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

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

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

A Jenga-style cylindrical tower of books that appears to go on forever.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Ruins of a German Castle on top of a towering stone pillar.

A student driver's nightmare.

This classic restaurant features a gorgeous mirror-clad room.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.