The stones that traveled from Spain to eventually become a holy place for San Francisco's nature worshippers.

A collection of memorabilia from the Beat era in the back of a San Francisco bookstore.

This 19th-century church is now a popular roller rink.

Art Deco stylings conceal the true nature of this bridge.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

Decor at “Nevada’s Oldest Thirst Parlor” includes Raquel Welch's brassiere hanging from a stuffed moose head.

This abandoned Greek island was the last active leper colony in Europe.

Go inside to really appreciate this 500-year-old technological masterpiece.

A homage to the King at the hotel where he revived his career.

A controversial memorial at the place where Captain Cook met his violent end.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

This legendary urban waterfall creates a dazzling display of rainbows.

This world-class vineyard has a peculiar collection of contemporary sculptures scattered across the property.

Oakland's beautiful monumental cemetery.

A crumbling Beaux Arts monument to the Bay Area's age of rail.

Julia Morgan's Moorish-Gothic labyrinth of fountains, trees, natural light and Oakland's notable dead.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

A marvel of Byzantine engineering under the streets of Istanbul.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

Single runway interrupted by a busy road that cuts across its middle.

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

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