A 131-year-old wunderkammer of Texas history.

This restaurant has been a haven for D.C.'s LGBTQ community since the 1950s.

Ruins of a historic medical facility sits eerily by the water.

A mysterious air force base built to resemble a Long Island fishing village.

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

The romance of early commercial flight still fills this Art Deco destination.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

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.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

At 207 feet, one of the world's longest continuous escalators.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.

George Washington's dentures and Queen Victoria's dental instruments are in the nation’s official museum of the dental profession.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

The land is home to swimming ponies and a legendary 18th-century treasure.