For some reason I've been really enjoying stories with endless and well described repeating rooms. Borges' Library of Babel got me started, I have just finished Susanna Clarke's Piranesi - which was so wonderfully described, I don't know if I'll find anything to beat it. I'm now on A Short Stay in Hell by Steven L. Peck, which outright mentions Borges' novel. If anyone has any similar recommendations I'd love to hear them.