Home to a dizzying array of letterpress blocks with a rich history.

New York City's only radical feminist independent bookstore.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

An unassuming secret door once led to a legendary watering hole.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Once a strategically imperative naval base, portions of this Bermuda dock complex now serve cruise ships.

The world's smallest drawbridge.

Final resting place of a New Haven urban legend.

Home of Philip Johnson, one of the 20th century's most influential architects.

The ruins of an abandoned 18th-century town that is slowly being reclaimed by the forest.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

A superbly preserved example of Georgian residential architecture that was once home to one of the founders of Alexandria, Virginia.

Long buried under the 20th-century landscape, this lift lock of the Alexandria Canal is the lone remnant of an ambitious early American transportation project.

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

America's first federal monument.

A massive, majestic mammal watches over pedestrians from his perch atop a former B.P.O.E. lodge.

Once the largest trading firm of enslaved people in the U.S., this building is now a museum that preserves Alexandria's dark past.

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

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

An original apothecary from 1792.

This small pedestal marks the spot of the first lot of land sold in Alexandria, Virginia in 1749.

The narrowest house in America is seven feet of pure spite.