The "first cat," "first dog," and even a presidential pygmy hippo all get their due in this museum.

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

Outdoor exhibits explore the contributions of European, African, and indigenous peoples to American frontier culture.

Developed by focused shutterbugs, this museum exposes visitors to more than 6,000 different cameras.

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

This campus chapel is Robert E. Lee's final resting place and a topic of debate about the legacy of the Civil War.

The FBI's urban training course may have the highest fake crime rate in the world.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

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

This museum explores the grim reality of life in the earliest British colonies in America.

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

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

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

An abandoned church gets a second life as a massive beer hall and event space.

A reversed traffic signal that was once violently misinterpreted as a statement on British-Irish relations.

This collection started by a Cornell professor once held more than 600 human brain specimens, including the one that belonged to its founder.

Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.

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

A quintet of history museums make this Virginia graveyard as much a resting place for funereal history as it is for people.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

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