A focal point of the Cuban government, this city square features one of the most iconic images in the country.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

This abandoned Olympic skiing facility still bears the scars of the Siege of Sarajevo.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

Five candy-colored villages on the Italian Riviera.

A former hen house turned curiosity cabinet displays one man's lifelong fascination with cannibalism.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Tucked away on the second floor of a small town library is one of the great private Victorian taxidermy collections looking today very much like it did in 1909.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

A well-preserved medieval village nested on a rocky outcrop and surrounded by a network of cliffs, natural bridges and canyons.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

A deteriorating 1990s Girl Scout camp in a beautiful lush park on Lake Ontario.

An underwater restaurant, surrounded by a coral reef.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

Underwater restaurant at the coral reefs of Eilat.

Fine dining 20 feet below the surface in the Indian Ocean.

Bioluminescent firefly squid light up this Japanese fishing port.

An isolated dive site teeming with cnidarians.

This small museum in a former church crypt contains artifacts of the Elephant Man, Jack the Ripper and Florence Nightingale.