At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

The most accurate timepiece in the world.

There just so happens to be a court even higher than the U.S Supreme Court: a basketball court in the building itself.

The walls of the iconic dome are hollow and have a secret stairway.

The site of the climactic scene from the classic horror film is now a historic landmark.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

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

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

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

The prototype for all Nazi concentration camps.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

An ancient iron pillar in Delhi that seems to be rustproof.

A blooming house of worship for the masses.

The world's second-largest sundial, made entirely out of stone.

Sacred Indian temple that’s all monkey business.

An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

Formerly known as the Malay Quarter, Bo Kaap is a colorfully-painted suburb located in the “Mother City” of South Africa.