A restaurant and lodge in northern Wisconsin which served as a clandestine hideout for John Dillinger and featured one of the most famous botched FBI raids in history.

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

A theme park attraction designed to turn your children into LARPers.

Wisconsin's most celebrated export gets the royal treatment on I-94.

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.

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

An overlooked memorial honoring the local Washington residents who died in World War I.

The elevator that makes it possible to fly American flags in bulk over the U.S. Capitol

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

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

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

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

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

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

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

Where the U.S. government kept its actual treasure, before Fort Knox.

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

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

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.