A grotto is a natural or artificial cave, often found near water sources like lakes or oceans. These formations can be small or large and are typically characterized by their unique rock formations and sometimes beautiful mineral deposits. Grottoes are often used for relaxation, meditation, or as scenic spots for visitors. In addition to their natural beauty, grottos have historical significance in various cultures. They have been used as places of worship, retreats, or even as decorative features in gardens. Famous examples include the Blue Grotto in Capri, Italy and the Grotto of the Redemption in Iowa, USA.