It's included on My Daily Read for a reason. If you aren't a frequent visitor, you are missing out. I'm talking about Subterranean Design of course.
This amazing collection of images should serve as fantastic inspiration for anyone who plays D&D, or any fantasy, science fantasy, or even science fiction rpg out there. Absolutely incredible--I cannot say enough about how good the site is.
And for those gamers who claim that dungeons are unrealistic, outdated, or just plain stupid, taking a look at the real world dungeons presented at SubDes should change your mind. If it doesn't? Well, that sounds like a personal problem to me.
Go check it out. Check it out often. Check it out every day. You won't be disappointed. I promise.