It helps to put in Things, People can use. E.g. Bottles, Chairs oder Stuff from a Market like in Italy. Sounds from Animals or People inside the Buildings like a Talk or a TelephoneRing would be nice, too.
The Map was designed for the TheWall.de Half-Life Deathmatch Remake Mapping Contest (ThWC2) and is a Remake of good old Frency:
Download: http://zenz.planet-pepe.net/levels/half-life%20deathmatch/thwc2_asylum.zip