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 often flooded at high tide. Sometimes, artificial grottoes are used as garden features. The Grotta Azzurra at Capri and the grotto at Tiberius' Villa Jovis in the Bay of Naples are examples of popular natural seashore grottoes.
Eternal Flame Falls in New York has an eternal flame inside a small grotto behind the falls
Grutas de García in Nuevo León, Mexico
Two vaulted grottoes called Taq-e Bostan, located in Iran, Sassanian era
Niccolò di Raffaello di Niccolò dei Pericoli, called "Il Tribolo" was an Italian Mannerist artist in the service of Cosimo I de' Medici in his natal city of Florence.
Grotto of animals by Giambologna in the Villa di Castello, Florence
Exterior of the Villa di Castello in Florence