It is a gloomy and spooky place, with many statues of monsters from his horror works.
Scooby-Doo! Mystery Incorporated
Shaggy Rogers and Scooby-Doo went over to help him write a teenage romance novel to please the Dean, in exchange for Spanish translation work he promised to do for the gang. Hatecraft had decorated one room with (very out-of-date) teen posters to help him get into the mind of a teenage girl.