A large circus museum with summer performances.

Statue dedicated to the star of an old television show.

The bugs crawling down the front of this office building are almost as big as a '68 VW Beetle.

More than 5,000 contemporary and "historic" mustards from around the world.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

A place to eat for on-the-run agents and espionage enthusiasts.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

This striking art museum holds an amazing series of curiosity cabinets.

The arboretum whose marshy soil sucked up the dreams of housing developers.

This cave holds a surprisingly colorful variety of geological oddities.

The historic home still shows the scars from a little run-in with the British in 1813.

WWII-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers. .

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

The most accurate timepiece in the world.

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

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

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

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

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

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

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

The most decorated dog of World War I is preserved in the Smithsonian.

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

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