One of the Treasury Building's original columns now sits as a garden monument in the middle of a busy military base.

Home to a 27 room house, this estate was crafted by Black entrepreneur Olander Banks Sr.

The only surviving 19th-century water-powered mill found in the Washington, D.C. area.

Hidden in the forest atop a long, winding driveway is this stately home.

Originally dubbed "Retirement" by the Navy Commodore who built it in 1780, this beautiful mansion is now the centerpiece of a suburban community park.

The only remaining African American schoolhouse in northern Virginia is now a museum dedicated to formerly enslaved people.

Hear, smell, see, taste, and touch history at this immersive Civil War hospital.

Hidden for 165 years inside a building designed by Thomas Jefferson are the remains of what may be America's first educational chemistry lab.

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

A cement mixer-turned-kaleidoscope in downtown Norfolk offers different views of the city.

The word "Watergate" will forever be associated with the infamous scandal in 1972, but this fountain is famous in its own right.

A garment factory hides a small Dominican eatery in the hallway to its freight elevator.

Remnants of a storybook amusement park hidden behind a strip mall.

This suburban park recalls the history of a famous tavern. Despite the name, it's no ordinary place!

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

A market built atop boats is one of the few floating holiday markets in Europe.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

Abandoned Italianate architecture on the coast of Maine.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

The only remaining historic maritime signal station in the United States.

This giant monument of the RCA mascot is a beloved fixture in Albany, New York.

The first American home of the isolated, egalitarian religion has a trove of Shaker architecture and artifacts.