* The Zone of Saturation: This is the area where the spaces between rocks and soil are completely filled with water. This is where we find groundwater.

* The Water Table: The upper boundary of the zone of saturation is called the water table. It fluctuates depending on rainfall, drought, and other factors.

* Aquifers: Groundwater is stored in underground layers of rock and sediment called aquifers. These act like giant underground reservoirs.

Here are some common locations where groundwater is found:

* Porous Rocks: Rocks like sandstone, limestone, and fractured bedrock can hold large amounts of water.

* Soil: The spaces between soil particles can hold water, especially in areas with sandy or gravelly soils.

* Underground Caves and Caverns: These large open spaces can store significant amounts of groundwater.

Remember: The depth of groundwater can vary greatly depending on the location and geological formations.