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

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

Largest Roman Catholic church in North America.

A priceless collection of the Nation's cryptologic history.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

This simple stone memorial remembers a secret, Geneva Convention-defying interrogation base from WWII.

Meet some of the most prominent figures in Black history through life-sized wax models.

America's first federal monument.

A much-maligned monument to teetotalism.

A super-sized promotional trick that is now a D.C. landmark.

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

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

The Grand Ole Opry's big voice came from a small home in rural Virginia where she was eventually buried.

This grave marks the passing of a historic Jane Doe whose identity remains a mystery to this day.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

An original apothecary from 1792.

Outsider art meets paleontology at this roadside reptile repository.

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

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

Daily lunch spot for many of Washington, D.C.'s cab drivers.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

The iconic D.C. restaurant where the Cuban Missile Crisis was negotiated, now a Walgreens.