The Cambridge pub where Francis Crick announced that he and James Watson had discovered the DNA double-helix.

A tiny, unassuming park in Tampa that belongs to the Republic of Cuba.

"Bite or Smite" became the unlikely mascot of a Tampa suburb.

This underground oasis is one of North America’s most fascinating prehistoric places—and you can scuba dive in it.

Four metal statues of massive animal penises stand outside the university's Animal Sciences building.

Over 12,500 words are scrawled across each room of this historic plantation house and no one knows why.

A thriving Black community was destroyed by an angry white mob at this site in 1923.

This home is decked out like a psychedelic explosion of colors and bowling balls.

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

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

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

This pun was simply waiting to come to life, and one defense contractor made it so.

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

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

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

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

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

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

The snowbirds here are circus sideshow performers.

The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

Intertwined, interspecies trees which locals believe can grant boons to lovers.

This curio museum seems like the type of place you might find a mogwai or a monkey's paw.

Location of a reliquary containing bone fragments of 18 saints.