This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

The only place for a truly presidential dram.

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

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

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

An easily overlooked memorial to a Ukrainian famine-genocide that killed over 4 million people.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

Home to items never before seen by the public.

The most accurate timepiece in the world.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

A field of nothing but boulders which resembles a giant's gravel driveway.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

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

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

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

The naval commander’s proudest moment in battle is memorialized in this unique tomb at Arlington Cemetery.

The rogue roots are gradually consuming some of the historic marble grave markers.

A sharp bend in a dramatic river canyon cut through red rocks.

Most-visited and most-photographed slot canyon in the American Southwest.

When ecosystems collide in the arid Southwest.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.