Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

The national park was once a plantation estate.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Home to items never before seen by the public.

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

The United States Capitol's former columns still stand.

An artist's cute bronze subway sculptures belie his violent artistic past.

A semi-scholarly approach to sex.

A terrific purveyor of natural history objects and curios.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

The land is home to swimming ponies and a legendary 18th-century treasure.

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

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.