My present project within the Source Engine: a yet untitled downtown scene, very loosely inspired by the Milwaukee downtown-area. The only textured part of this map so far is the parking garage. Partially because it is the only part of the modeling that is complete. The rest is still covered in developers textures as there is still re-sizing going on, so all textures would need to be adjusted anyway.
Bearing a bit if resemblance to the Bradley Center exterior is the arena portion of the map. My original plan was to have the player go through the front entry-way (but never actually enter the arena itself as this would require a large amount of modeling for an area I never intended to have the player enter).