Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

A natural formation that resembles a camel resting in the New Mexico desert.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

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

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

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

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

Perhaps the most scandalous statue of America's first president.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.

This 12-foot-tall T-rex is the largest K’Nex skeleton sculpture in the world.

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

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

Largest Roman Catholic church in North America.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

The world's largest military aircraft cemetery.

This former coal gasification plant found a curious second life as a popular public park.

A wall of chewing gum moonlights as collective art.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

America's only nuclear missile silo open to the public.