A far less savoury character that once inhabited the shores of Loch Ness was the self-proclaimed "Great Beast" Alestair Crowley - who owned and lived in Boleskin House for several years in the early 20th Century. Crowley was an active and open participant in Satanism & the Occult and there were many rumours about the dark deeds said to be taking place in the otherwise unassuming house overlooking the waters of Loch Ness.

There were even rumours of a secret tunnel linking Boleskin house to a nearby graveyard close to the waters of Loch Ness where it was rumoured he would perform satanic rites and ceremonies under cover of darkness. Nowadays Boleskin House is still said to carry with it the taint of Crowley's obsession with the waters of Loch Ness.