The "Bridge Over the Atlantic" lets you cross the waterway in mere seconds.

This ancient walled garden turns fog into food.

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

Michael Heizer's masterwork in the Nevada Basin.

This massive geographical sculpture is so subtle, it's possible to pass by it without noticing.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

A sculpture for the sun and stars, created by Nancy Holt.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

A modernist landscape of water and sci-fi concrete.

A quirky collection of old chairs fills a random vacant lot in suburban Texas.

These planks were originally installed to hold the dead.

This pair of running lions engraved on animal bone is one of the earliest artistic depictions of big cats.

At 16,627 feet above sea level, this unstaffed station is the highest in the world.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

Stockholm's narrowest alley is barely over two feet wide.

Swim or sail to this pie-slinging boat off the coast of St. Thomas.

This Old West prison built into the side of a cliff was said to be inescapable.

Every plane, auto, and bicycle in this collection is kept in working order and are regularly demonstrated to the public.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

Despite its grandiose name, this enigmatic first-century void under the town is no cave, and it's possibly not a palace either.

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.