Three bridges and one giant canyon make up this fantastic Spanish settlement.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Catacombs turned marketplace.

One part antique store, one part curiosities hodge-podge.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

A Bibliophile's Dream.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

A fiery crater has been burning in the Karakum Desert since 1971.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

Hanging over one of Japan's "hidden valleys," these vine bridges must be remade every three years.

An acoustic anomaly with a mysterious cause.

A modernist landscape of water and sci-fi concrete.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

The world's longest known cave system.

According to one local tradition, the entrance to the Voodoo underworld can be found in New Orleans through seven gates scattered throughout the city's French Quarter.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

The longest hedge maze in the world.

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

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.