Located inside the Robert Sibley Volcanic Regional Preserve, the Mazzariello Labyrinth is a maze of rocks that was created by Helen Mazzariello. It is found in a delicate earthquake-prone zone, in an old limestone quarry. Locals explore the maze and on reaching the center, leave a token as an offering. The park authorities are very strict about the environment guidelines here. Wild flora and fauna like mountain lions are also spotted.

Phone: (888) 327-2757

Cross Streets: Near the intersection of Skyline Blvd and Diablo Dr/Grizzly Peak Blvd