An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

This verdant, tree-lined Reykjavik graveyard is both enchanting and eerie.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

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

A quiet and contemplative oasis in the middle of New York's bustle and riot.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

His music once banned in Communist Cuba, John Lennon is now immortalized in bronze by Castro, who considers Lennon a "fellow dreamer."

A Spanish-style estate that has traded black ties for rock concerts.

A Cuban artist reclaimed his impoverished neighborhood as a dreamy folk art kingdom.

A much-maligned monument to teetotalism.

Where the U.S. government kept its actual treasure, before Fort Knox.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

Not truly a ship nor a building, the Navy's first and last "landship" is now abandoned due to clerical issues.

This San Diego museum, housed in a former Navy training facility, is dedicated to preserving women’s historic achievements.

Lucha Libre (Mexican Wrestling) themed taco shop.

A couple turned their front yard into an artistic masterpiece.

An inconspicuous footbridge beloved by San Diego locals.

Swarms of butterflies cannot compare to the awe inspired by the publicly-funded nakedness once displayed in this sunken garden.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.