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

FDR's Art Deco hospital tower was hopelessly inefficient.

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

A portal into the bricked up canal that runs through the heart of Washington D.C.

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

The bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

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

There’s a hidden military meme engraved on the World War II Memorial.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

The national park was once a plantation estate.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

The word "Watergate" will forever be associated with the infamous scandal in 1972, but this fountain is famous in its own right.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

A building shaped like the Army Corps of Engineers logo, because why not?

A merry-go-round that became a rallying point for the early Civil Rights Movement.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

The only surviving 19th-century water-powered mill found in the Washington, D.C. area.

This pun was simply waiting to come to life, and one defense contractor made it so.

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

These unusual rooms on wheels are holdovers from the 1960s.

Dine like an American revolutionary at Colonial Williamsburg.

An out-of-the-way wildlife haven with a rich and storied past of harboring thousands of fugitive slaves, or "Maroons" during the mid 1800s.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.