Come for the flowers, stay for the bats!

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

Europe's largest prehistoric mound – burial site of a legendary king?

The largest stone circle in the world has ended up bringing up more questions than it has answered.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

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

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

The iconic D.C. restaurant where the Cuban Missile Crisis was negotiated, now a Walgreens.

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

Decades before the scandal, this staircase on the river was a literal "water gate."

A historic arena where the Beatles played their first concert in the U.S.

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

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

Yo, Adrian!

This elaborate towering structure was once famed for its revolutionary height.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

The first American department store, and home to the largest operating musical instrument in the world.

A massive sea stack famous for its appearance in The Goonies.

This massive redwood tree has a hole in the base big enough to drive through.

A popular winter vacation destination for migrating monarch butterflies.