Crypts are underground chambers or vaults, often used for burial purposes. They can be found in various cultures and are typically designed to hold coffins or remains. In some cases, crypts are part of larger structures like churches or cathedrals, serving as a final resting place for important individuals. In addition to their use in burial, crypts can also refer to small cavities or pits in biological contexts, such as the intestinal crypts in the human body. These structures play a role in the production of new cells and the maintenance of healthy tissue.