The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

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.

Rumor has it the hot dog stand was targeted by two Russian nuclear missiles.

Born a slave on the Arlington estate, Parks dug the first graves at Arlington National Cemetery, and was buried there, too.

The naval commander’s proudest moment in battle is memorialized in this unique tomb at Arlington Cemetery.

A winding district gerrymandered into the shape of a mantis.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

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

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

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

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

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

There’s a hidden military meme engraved on the World War II Memorial.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

An astounding collection of medical specimens, including bits of President Lincoln.

A sharply wedged sundial marks the point at which each day in the United States begins.

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.

World's first "penitentiary," meant to be humane, drove men insane.

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

This museum in the woods evokes the work and lives of Michigan's 19-century lumberjacks.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

This enormous fish commemorates the unplanned release of brown trout into a Michigan river.

This resort community was known as the "Black Eden of Michigan."