This antique prison is a tourist attraction with a sordid past.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

Hidden for 165 years inside a building designed by Thomas Jefferson are the remains of what may be America's first educational chemistry lab.

Take an otherworldly journey in a school dedicated to out-of-body experiences.

The resting place of a Civil War celebrity's amputated limb.

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

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.

This once-palatial plantation may have been the site where a draft of the Declaration of Independence was written.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

The legend of a local monster still haunts this small town.

This robust fence in front of a historic Georgetown home is likely made from hundreds of recycled Revolutionary War firearms.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

Home to a vast and influential collection of Shakespeareana.

Largest Roman Catholic church in North America.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

The national park was once a plantation estate.

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

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

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

A wondrous old library overlooking the nation's capital.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

A historic neighborhood church is reborn as a psychedelic arts collective.