Please don’t anchor your boat onto the Department of Defense’s underwater data cables.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

The most historic church in Fairfax County played a role in the creation of the American Red Cross.

One of the oldest train stations still standing in Virginia played a vital role during the Civil War.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

An echo chamber with a waterfall wrapped around its base at the Embassy of Canada in Washington, D.C.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

An easily overlooked memorial to a Ukrainian famine-genocide that killed over 4 million people.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

This memorial honors five journalists who were killed in a mass shooting in 2018, and affirms the importance of the first amendment.

The oldest house in Washington, D.C. wasn't originally constructed in the nation's capital.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

Go take a picture with the inventor of the daguerreotype photographic process.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

Also known as the Founding Church of Scientology.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.