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

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

Home to a vast and influential collection of Shakespeareana.

A historic ruin just 20 feet away from a busy highway onramp.

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

These unusual rooms on wheels are holdovers from the 1960s.

This church built atop a gas station promises to "equip you for the next stage in your life’s journey."

A former major munitions plant that has been converted into a sprawling art space.

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

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

An Industrial Revolution-era public work that purified water using nothing but sand.

The bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.

A line of blue paint marks the route of the inaugural parade.

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.

A portal into the bricked up canal that runs through the heart of Washington D.C.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

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.

Experience a quartz crystal sound bath inside a storied, all-wood sound-chamber.

Odd outsider art installations surround a Gold Rush-era ghost town.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Two giant painted cooling towers make for one of the world’s most epic bungee jumps.

Spanning over 10,000 square miles, this ancient salt pan is one of the largest on the planet.