Mine is the Bloom from Torment: Tides of Numenera. I love the fleshy bits. I love the everyday gruesome horror becoming an everyday thing for the people who live there. I love the literally organic surroundings. It’s just by far my favorite location in any game ever. :)
Q3DM17, “The Longest Yard”. I’ve fought so many 1v1s there, it’s one of the few fps maps that still regularly turns up in my dreams despite my haven’t having Quaked for like 10 years now.