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

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

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

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

World War II bunker still standing on the New Jersey beach.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

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

Built by the patriotic residents of Boonsboro in a single day.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

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

Largest Roman Catholic church in North America.

The United States Capitol's former columns still stand.