You could bet any Goosebumps setting had its share of horrors, but some book titles let you know upfront that the location was a deathtrap. Like Welcome to Dead House, Welcome to Camp Nightmare, One Day at Horrorland, Ghost Beach, A Night in Terror Tower, A Shocker on Shock Street, Ghost Camp, The Haunted School, Stay Out of the Basement, The Curse of Camp Cold Lake, The Horror at Camp Jellyjam, and The Werewolf of Fever Swamp. (Of course werewolves hang out there.)
A few of those locales have "ghost" in their names as well. Not-friendly Caspers figure prominently in Stine's world, notably appearing in Ghost Camp, Ghost Beach, The Ghost Next Door, The Barking Ghost, and The Ghost Next Door.
Overlap: Ghost Beach, Ghost Camp