Museum of Mourning Art
Drexel Hill, Pennsylvania
The Museum of Mourning Art in Drexel Hill exhibits a variety of funerary items, death-themed jewelry, hearses, etc. Perhaps the best item is a Cemetery Gun, a boobytrap of sorts from 1710 that would fire when a graverobbing medical student or ghoul stumbled over a trip wire. Or a mourner, unfortunately.
It is in the main building (a replica of Mount Vernon built in the 1980s) of Arlington Cemetery.