Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

This leafy estate is worth $18 million and is so grand it has two mailing addresses.

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

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

The world's oldest soul food restaurant is also one of its best.

A computer bug so primitive it was an actual insect.

There's a crumbling old mansion inside the Smithsonian National Zoo.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

This hotel was the site of major events in sports and radio history. It was also used as a detention center during World War II.

The site of Paul Revere's historic two lantern warning.

Remnants of cone-shaped fascist bomb shelters in Milan.

Long-abandoned art nouveau baths beneath Milan's Piazza Oberdan.

A mother's mourning for her lost son is remembered in this small park embedded with his memory.

A 2,500-pound wooden nickel makes this woodworking museum easy to spot from the road.