A cenote is a freshwater cave typically found close to saltwater but removed somewhat inland. Many of these caves are miles long and invite SCUBA exploration.
The Intertidal Zone area is the interface between the land and the ocean. It is a rocky shoreline that are defined in relationship to the tidewater levels.
Lake Tahoe is the largest of the freshwater lakes in California and Nevada. The lake is in a high alpine setting and is known for its clarity and beauty.
The explored depth of the Mariana Trench is over 6.8 miles deep! At this depth the pressure is 15,750 psi, more than 1000 times the pressure at sea level.
A pond is a body of water smaller than a lake and bigger than a puddle. Ponds can be naturally occurring or man made, and are filled with plant and animal life.
A sea stack is a rock outcropping found along any coastline. Unlike reefs and atolls, sea stacks are notable for their tall size. They are homes for seabirds.
Smith Lake, in the Trinity Alps of Northern California, is a glacier carved, deep pool of water situated in the remote central portion of the wilderness area.