During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A gaudy painted elephant stands in memory of south Florida's fallen carnies.

Neglected resting place of some of the city's early luminaries—and a woman encased in concrete.

With nickel-steel armor and three-inch thick bullet resistant windows, FDR's train was a rolling fortress.

In memory of the 110 victims of ValuJet Flight 592 that crashed in the Everglades.

Former villa and estate of James Deering developed to preserve native tropical forests.

A community of collapsing homes more than a mile out from the Florida coast.

A perfect circle of twenty-four mysterious holes dates back to prehistoric time.

St Bernard de Clairvaux Episcopal Church, better known as one of the oldest European buildings in the Western Hemisphere.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.

Also known as the Founding Church of Scientology.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

This grisly headstone doesn’t seem to be resting in peace.

More than 500 unique and specially designed cases collected by D.C.'s "Harmonica Case Man."

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

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

Obscure Freemasons still live in D.C.’s largest private residence.

The most accurate timepiece in the world.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

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

The national park was once a plantation estate.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.