Washington's iconic carousel has a nice piece of Civil Rights history.

A historic ruin just 20 feet away from a busy highway onramp.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

The "lovely red Vega" of the legendary record-settling pilot.

The most accurate timepiece in the world.

Perhaps the most scandalous statue of America's first president.

Decades before the scandal, this staircase on the river was a literal "water gate."

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

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.

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

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

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

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

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

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

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

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

A lawn full of retired spacecraft on display at one of NASA's first research labs.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.