Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

Two insane asylum bodies embalmed by an amateur.

The flower-shaped temple in Virginia aims to transcend the boundaries of the world’s religions.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

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