Kleiner's building has a working elevator that can travel between three floors.
The rooftop pathway that connects the raid apartment with Kleiner's lab and attached industrial building.The courtyard for the raid apartment features a functioning tic-tac-toe game (The physgun can help move and freeze each piece). Each apartment is left mostly blank, allowing some customization.
Two apartment buildings (including the infamous raid apartment from HL2) with 8 livable and 1 abandoned apartment between the two.It also has a functioning vending machine. Acts as the spawn point and the Combine HQ for the district. A complete Trainstation with trainyard.