Lake of Rings

The Lake of Rings is an area where magical things happen.

Fly Fly Freddy
Fly Fly Freddy attacked Sonic at the original Lake of Rings, but was scrapped by Knuckles at the last minute. (StH: #42)

Tommy
When Dr. Eggman sent an Auto Automaton disguised as Tommy Turtle to Knothole, Jules audio sensors picked up a possible assassination attempt, and he confronted the infiltrator, only for the robot to drill a gaping hole through his key circuits. After destroying the fake turtle, Sonic took Jules's body to Uncle Chuck, only for him to conclude that Jules's life force was gone. Just as Chuck pronounced Jules dead, Sonic remembered the Lake of Rings. Sonic then raced to the lake, swiped a Power Ring, and used it to bring Jules back from the dead. (StH: #136)