The Secret Pit
A circular outdoor arena, with grandstand seats, and a small but deep (waterfilled) pit in the center. All the goodies (SPNKR, TOZT, powerup canisters) are in the central pit... but good players will be able to take a good chunk of health out of someone diving in - the opening is small enough that you have to slow down to a walk to get in. Better hope you actually kill them going down!
Levels in map "Secret Pit":
Harena