This is a really useful location, one that’s creepy enough to put players on edge. Definitely one that I’ll find a place for in my game.
As to the design, you’ve got a ton of ideas and good directions as to using them. My problem is with the font choices you’ve made- giving over one of your 4 pages to a picture has forced you down a route where I find it hard to read your writing in some places. Probably my ropey old eyes but I’d have to make a B/W print friendly version to DM with. On the plus side, highlighting the “ask the player” questions works really well.
I like your entry, an excellent location to drop into a campaign