Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

An ancient Egyptian temple in the middle of Madrid, Spain.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

An elaborate shrine dedicated to the four corners of the world unfortunately misses its mark.

The world's second largest single-dish radio telescope, once used to contact E.T.

Rusting, graffiti-covered tanks litter the beach of this island, once used by the U.S. military for target practice.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

“Invented in Key West, Perfected in Brooklyn."

Red frames showcase remnants of one of New York's original subway stations.

One of only two commuter aerial tramways in the United States.

Lie in a hammock where George Washington stood.

There must be a pun in this haystack somewhere...

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Mysterious 500-year-old tapestries depict a unicorn hunt.

An artist's cute bronze subway sculptures belie his violent artistic past.

The most confusing clock in New York.

Elevated freight railway turned wildly successful urban park.

A terrific purveyor of natural history objects and curios.