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

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

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

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

The most accurate timepiece in the world.

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

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

A much-maligned monument to teetotalism.

A computer bug so primitive it was an actual insect.

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

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

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

The only known Futuro house in North Carolina sits along a stretch of desolate highway on the Outer Banks.  .

A historic covered bridge, only one of two remaining in North Carolina.

Andy Griffith's hometown has made itself up to look like the fictional town of Mayberry.

Visit the monolithic tomb of America's most famous general.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

This curved Manhattan building was built to house the opulence of John D. Rockefeller's oil empire.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.