This sprawling farm was once a Cold War-era hideaway for the nation's top diplomats.

At this former Prohibition speakeasy, electric birds signaled the arrival of hooch.

A relic of FDR's brief foray into utopian urban planning.

This colorful gate stands as an entrance to the walled city of Old San Juan.

On this Puerto Rican island, many abandoned naval ammunition bunkers sit open while a few have been padlocked by locals as personal storage.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

The Virginia farm where John Wilkes Booth met his grisly end is now largely forgotten.

Giant busts of 42 U.S. presidents sit, crumbling in a field in Virginia.

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

Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

A diorama of the Civil War, fought by cats.

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

This monument marks the beginning journey of a wounded soldier's leg that ended up almost two states away.

Home of the only civilian casualty at the Battle of Gettysburg.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The blinking light atop the iconic landmark has been sending secret messages for decades.

This former asylum for Black Americans is haunted by its history of violence and racism.

The only public school for Black children in the region from 1895-1936.

The oldest military monument in the United States.

This propitious plastic porcine has been petitioning park visitors to pick up after themselves for more than 50 years.

Just outside the Naval Academy, Hell Point is a historical marker that could easily be the point where failed students wait for the bus.

The hidden ruins of a mill that is linked to an attempt to assassinate the vice president of the United States.

A winding district gerrymandered into the shape of a mantis.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.