What is your favorite map?

Blackbrook Asylum is a beautiful map for Gmod, and by far it's my favourite. Thing is, it's more based on scenery and it's not so much just for convenient Sandbox play like other maps, but just to enjoy the scenery and make courses or play multiplayer DM or just make videos and saves with.

Just note, you may need a monster computer for that map. I tried it on my old computer, oh man, That was an ugly framerate.