Stonecutters Lodge

The Stonecutters Lodge is the former headquarters for the Stonecutters.

History
Homer followed Lenny and Carl here and fell through the glass roof, only to be kicked out the door. After Homer joined the organization, he was found to be the chosen one and took over the organization and the building until everyone decided to quit the Stonecutters. Homer sat in here ashamed with a lot of monkeys reenacting the civil war.

Non-canon
In The Simpsons: Road Rage it is located near the Springfield Dam and is a place where you can drop people off. In The Simpsons: Hit & Run, the Stonecutters Lodge is seen in the 939 area code of Springfield (the "rich" district) next to the entrance of the "Stonecutters' Secret Tunnel", it is a similar looking building and although white, the Stonecutters' logo seems to be above the door.