I’m sure, if I was physically transported to 50% of the perilous other-worldly scenarios that I encounter in print, I’d be scared witless but there are a couple that have stuck with me after I’ve finished reading (one for so many years it probably counts as trauma).
Houses already seem to be a theme, so I’d add the one from Catherine Storr’s Marianne Dreams, which my Mum innocently got me from the library when I was off school ill and in bed. If I see an isolated, square house on some moorland, I still catch myself looking for the boulders.
Then, the hidden city in Nicholas Royle’s Regicide. I was hooked by where the map was for, only to discover it was a disturbing, confusing and full-on dystopian place. To be fair it wasn’t a feel-good novel all round, but that was one nasty city.