This small and often-overlooked museum holds some of Spain's finest artistic treasures.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

Hindu temple of the dead home to hundreds of long-tailed macaques.

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

A remnant of the original World Trade Center complex continues to serve as a commuter gateway.

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

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Elevated freight railway turned wildly successful urban park.

A Stockholm metro station is home to an escalator that is not only the longest in Sweden, but among the longest in the world.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Stockholm's deepest subway station is also a stunning ecological wonder.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

A tall karst islet popularized by 007.

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.

The Hollywood home of Kermit the Frog and Yoda used to be Charlie Chaplin's film studio.

If you don't look closely, you might mistake this sculpture for just another passenger waiting at the airport.

A glimpse at Walt Disney's vision for a "community of tomorrow," in miniature.

Opened in 1976, this monster-sized version of the fast-food franchise is sometimes called the Epic McD.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Because there's no place like home.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.