Hollywood Roosevelt Hotel: Marilyn Monroe is said to appear in a mirror near the elevators—a mirror that used to hang in her room. Actor Montgomery Clift is rumored to haunt his former ninth-floor suite—number 928—with reports of bugle playing and line-rehearsing heard in the halls just outside.
The morgue at Alcatraz. The federal prison on Alcatraz Island in the chilly waters of California's San Francisco Bay housed some of America's most difficult and dangerous felons during its years of operation from 1934 to 1963.
The Ridges Asylum in Ohio. A 54 year old female patient who ran away and was missing for 6 weeks. She was found dead in an unused ward. She had taken off all of her clothes, neatly folded them, and laid down on the cold concrete where she subsequently died. Through a combination of decomposition and sun exposure, her corpse left a permanent stain on the floor, which is still visible today.