Lucha Libre (Mexican Wrestling) themed taco shop.

San Diego's most historic and haunted home.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

An inconspicuous footbridge beloved by San Diego locals.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

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

This monument traces the segregation line that inspired the first rural branch of the NAACP.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

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

The whole world in one water tank.

The sole surviving building from Newgate village, a colonial settlement that was renamed Centreville in 1792 after it was granted town status by the Virginia Assembly.

Three abandoned missile silos are hiding in plain sight behind a suburban development in Maryland.

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

The ruins of this long-abandoned unsuccessful gold mine can still be found.

Exact replica of the ancient monument, but much, much lighter.

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

Built in 1815, the stabilized ruins of the grist mill and sawmill are now gated, but interpretive displays on the features and functions of the mill preserve its history.

This ruined quarry once produced the distinctive red sandstone used for construction projects in Washington, D.C.

Born a slave on the Arlington estate, Parks dug the first graves at Arlington National Cemetery, and was buried there, too.

Once a sewer culvert, this road tunnel now offers cyclists and pedestrians a subterranean stroll under the C&O Canal.

This fertility idol of questionable authenticity inspired an iconic Indiana Jones artifact.

Was there a small "backpack nuke" hidden in the attic? JFK apparently thought so.

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

The early data processor factory founded in Washington for the 1890 U.S. Census went on to become IBM.