Be on the lookout for the symbolic insect all over the city.

A 19th-century time capsule of travel, fiction, and historic texts still available to the public.

The tower was originally used as a chimney for the waste incinerator of St. John's Precinct and Market.

A memorial to the politician who became Great Britain's first fatality to be caused by a locomotive.

Pyramid shaped monument with a tall tale attached.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

Washington's iconic carousel has a nice piece of Civil Rights history.

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

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

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

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

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

There’s a special club house at the top for the bell ringers.

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

Once America's tallest structure, now a Baltimore landmark.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

This elaborate towering structure was once famed for its revolutionary height.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

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

This magnificent museum claims to house the cranium of a disciple and the skull of a pope.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.