Crystal Tap

Crystal Taps are colorful octahedral switches in Super Mario 64 that will either lower or raise the water level in Wet-Dry World. If Mario is underwater and touches one, the water will drain, and if he's above the water and touches one, the water will rise up. There are seven in all and placed in strategic locations across Wet-Dry World. There's five in the main area, and two in the underwater town.