This patch of land is home to Sweden's largest burial mound, allegedly belonging to a mythical king.

Unfortunately, you can no longer spend a night in this single-person treetop hotel.

It houses the remains of a 17th-century version of the Titanic.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

Ming Dynasty necropolis raided during the Cultural Revolution.

The most famous location in China was home to whole dynasties worth of imperial rulers.

A Mayan village preserved for centuries in volcanic ash.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

This small New York museum celebrates the mountainous artwork of a Russian mystic.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

Hiroshima survivor on Riverside Drive.

This secluded ruin was once a home for exotic plants.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

This Dutch Colonial home is the oldest remaining farmhouse in Manhattan.

Salute the leader of the proletariat.

Rummage through this sunken ship, but leave your scuba gear at home.

A way to take your secrets to someone else's grave.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

Walk into the 19th century without leaving Brooklyn.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.