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

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

The site of the climactic scene from the classic horror film is now a historic landmark.

Largest Roman Catholic church in North America.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

There’s a special club house at the top for the bell ringers.

Giftshop catering to cryptozoologists and anyone with a sense of humor.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The iconic D.C. restaurant where the Cuban Missile Crisis was negotiated, now a Walgreens.

She stares out across six lanes of traffic, clutching a musket and infant with determination.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

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

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

An astounding collection of medical specimens, including bits of President Lincoln.

The rooster who crossed the road lives on forever in Takoma Park, Maryland.

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