Caves are the underground enclosure with access from the surface of the ground or from the sea. They are the natural openings of the Earth. Caves are formed by two methods:
♦ Weathering of rocks; or
♦ Through water seepage under the ground: Water flows through the cracks present on the Earth’s surface, dissolving certain underground rocks made up of
limestone which creates deep hollow shafts.
The world’s longest cave is Mammoth Cave in Kentucky, USA.
