A collection of outdoor mystical statues paying homage to indigenous Australians and ecological stewardship.

A priceless collection of the Nation's cryptologic history.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

A museum dedicated to exhibiting remarkable outsider art.

This free, take-a-book shop seems like a trick but isn't.

Eighteen miniature death-scene dioramas.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

A much-maligned monument to teetotalism.

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

Go take a picture with the inventor of the daguerreotype photographic process.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Home to items never before seen by the public.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

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

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

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

The national park was once a plantation estate.

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

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

Parking garage where Bob Woodward met Watergate source "Deep Throat."

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

Obscure Freemasons still live in D.C.’s largest private residence.