Hashima Island
https://www.hashima-island.co.uk/
Virtual walkabout of an abandoned island in Japan. Provides you with information on locations as you virtually traverse the island to spooky music. This is an effective way to terrify and educate!
Flavor: educational
The Monroe Institute
https://www.monroeinstitute.org/
An institute that researches and teaches about astral travel and out-of-body experiences. Founded by the late great Robert Monroe, writer of Journeys Out of the Body. His experiences, while unbelievable, are worth reading.
The Parapsychological Association
https://parapsych.org/
The official association of parapsychology, the study of psychic energy and human psychology. It’s all more than just twisting forks with your mind, and it deserves to be respected far more than it is.
The Fantastic in Art and Fiction
http://fantastic.library.cornell.edu/index.php
An archived site by the Cornell Institute of Digital Collections featuring historical art of the grotesque, the bizarre, and the obscene. A truly fascinating site to browse while mulling over a hot cider and contemplating your next horror project.