The ruins on a deserted tropical island in the Philippines bear the scars of WWII.

The fairy tale castle of the "fairy-tale king."

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The "lovely red Vega" of the legendary record-settling pilot.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

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

Largest Roman Catholic church in North America.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

Home to items never before seen by the public.

This tiny chapel withstood a massive mudslide and flash flood.

One of the largest squares in Europe contains an entire artificial island.

Turtles swim in a pond surrounding a classical temple in this lush park in Vicenza.

One of the tallest bell towers in Italy plays a particular melody at just two times each day.

The remains of 50,000 World War I soldiers rest under a towering arch overlooking the Alpine battlefields.

One of the tallest lighthouses in the world also serves as a monument to the fallen of World War I.

Something's missing between the arcades of the Palazzo della Ragione in "the city of the three withouts."