This elaborate towering structure was once famed for its revolutionary height.

This statue honors the author's groundbreaking family story.

A tribute to the beloved, kind-hearted "homeless mayor" of Silver Spring.

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

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

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.

This train station inspired the name of a 1970's rock band and provided the backdrop for their album cover.

Where pardoned turkeys once spent their all-too-brief final days.

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

A former major munitions plant that has been converted into a sprawling art space.

Outdoor exhibits explore the contributions of European, African, and indigenous peoples to American frontier culture.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

This fertility idol of questionable authenticity inspired an iconic Indiana Jones artifact.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

An overlooked memorial honoring the local Washington residents who died in World War I.

The first memorial dedicated solely to the Black troops who fought for the Union.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.