Mystery Caves (カメカメ せいてつじょ lit. Iron Factory of Turtles in Japanese) is a race course in Crash Team Racing that is raced on in the Nitro Cup (as well as Papu's Pyramid, Cortex Castle, and Tiny Arena) and the Red Gem Cup (along with Crash Cove, Papu's Pyramid and Blizzard Bluff). It is the third race course of the game.