The last standing example of an ancient district's teatime tradition.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

Elevated freight railway turned wildly successful urban park.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

The ruins of a once-thriving sugarcane plantation that was burned in the Second Seminole War.

A diorama of the Civil War, fought by cats.

A local prank turned town icon.

World's first "penitentiary," meant to be humane, drove men insane.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A giant time capsule not scheduled to be cored until 2040.

This general store is more than a century old and home to various oddities and antiques.

In an odd geographic anomaly this city borders two different states on opposite sides of town.

This university transit system is a 1970's vision of the future.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

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

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

An isolated island home to one of the oldest English-speaking communities in the region and Maryland's state dessert.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

Built by the patriotic residents of Boonsboro in a single day.