A Spiritualist house of worship where believers communicate with the dead in the spirit world.

A wondrous old library overlooking the nation's capital.

Before Nixon, "watergate" meant canals.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A painfully obvious spy house sits right across the street from the Russian Embassy.

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

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

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

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

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

This lovely pocket park is one of the most under appreciated in D.C.

The oldest continuously operating fish market in the United States.

One of the world's largest automobile junkyards is a unique landscape of metal and moss.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

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

Remains of a historic fountain that was mysteriously lost in the demolition of a D.C. traffic circle.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

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

Hop on the train and tour an elaborate miniature town made completely of junk (including the train).

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Smack in the midst of coal country, this collection provides a peoples' history of Appalachian miners' heritage.