The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

This old residential building was once the largest flour mill in the world.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

Built for the 1962 World Cup, this fully functioning botanical clock is still ticking.

The only quarter of the Old City not dedicated to a major world religion.

Known as the leaning temple, the sacred structure has somehow developed a severe nine-degree slant.

This unchanged Victorian park is rumored to have been the inspiration behind Peter Pan's Neverland.

Follow the original medieval paths that wind through this intriguing section of the city.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

A stretch of land where the sour-sweet vegetable is cloaked in darkness and grows so fast you can hear it crack, squeak, and pop.

Happy harbor seals frolic and snooze on this warm, sandy stretch of coast.

A small but hugely whimsical theater where marionettes play out the "The Battle of Stalingrad."

A stunning Catholic cathedral built by a curve-loving communist in Brazil’s newly created capital.

There are millions of temples in India, but only one prominent temple dedicated to the Hindu creator god.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

A spooky juxtaposition of caves and graves gives this legend-filled cemetery a particularly haunting vibe.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Captured in 1968, the Cold War spy ship is the only U.S. Navy vessel being held by a foreign government.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

Europe's highest peak is a key pillar of the Seven Summits mountaineering challenge.

An ancient fortified mound raised over the millennia from settlements built one on top of the other.

Was there a small "backpack nuke" hidden in the attic? JFK apparently thought so.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

All unmarked mute swans on the Thames are owned by the Queen per a tradition that began in the 12th century.