A “floating horse” hangs menacingly over the heads of passersby.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

The world's largest wooden structure.

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.

The final resting place of the great navigator, or maybe his brother.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

One man's remarkable private collection of art from around the world.

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

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Home to secret Eastern Bloc spy equipment and the largest stretch of the original Berlin Wall outside of Germany.

This jagged colossus of a building is mostly held together by an enormous concrete exoskeleton.

First LEED-certified gas station in the United States.

Sports history, made in the Arroyo Seco.

A self-made museum in Queens, New York continues to display the work of a sculptor known for paving his own way.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Stunningly detailed mosaics in a New York subway station bring life to the Weimaraners of artist William Wegman's work—and to thousands of commutes.

Read a book next to a Midtown waterfall.

There's a piece of New York City transportation history hidden in plain sight at a Manhattan subway stop.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

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

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

A modern day curiosity cabinet.

This serene oasis in an affluent Los Angeles neighborhood holds some of Gandhi's ashes and got Elvis into Eastern Philosophy.