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.

It's a pretty creepy lock-up.

St. Augustine's record-setting narrow street was designed to protect against pirates.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

A tribute to Ponce de Leon's supposed quest for eternal youth.

The decorations were inspired by an unlikely missing treasure.

This inanimate goat created by the "welding nun" has been helping to clean up the city of Spokane for more than 40 years.

This glass-stain Mary attracted thousands of pilgrims until her head was shattered by a vandal with a slingshot.

This Florida resort community is where the Amish come to have fun in the sun.