Description: Man-made caverns have been constructed for a diverse range of uses. It is convenient to divide them into those designed for short-term access, such as mines, and those designed as long-term structures. Mines are man-made openings designed for the commercial extraction of minerals.

How caverns are formed?

Caves are formed by the dissolution of limestone. Rainwater picks up carbon dioxide from the air and as it percolates through the soil, which turns into a weak acid. This slowly dissolves out the limestone along the joints, bedding planes and fractures, some of which become enlarged enough to form caves.

What is a manmade cave called?

A grotto is a natural or artificial cave used by humans in both modern times and antiquity, and historically or prehistorically. Naturally occurring grottoes are often small caves near water that are usually flooded or liable to flood at high tide. ... See karst topography, cavern.