At 207 feet, one of the world's longest continuous escalators.

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

An abandoned stretch of highway, deteriorating next to the operational one.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

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

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