GROTTO

grotto, grot

(noun) a small cave (usually with attractive features)

Source: WordNet® 3.1

Etymology

Noun

grotto (plural grottos or grottoes)

A small cave.

An artificial cavern-like retreat.

A Marian shrine, usually built in a cavern-like structure.

A local organization of cavers that typically organizes trips to caves and provides information and training for caving; a caving club.

(Satanism) A secretive name for a local group of underground Satanists.

Source: Wiktionary

Grot"to, n.; pl. Grottoes. Etym: [Formerly grotta, fr. It. grotta, LL. grupta, fr. L. crypta a con cealed subterranran passage vault, cavern, Gr. Grot, Crypt.]

Definition: A natural covered opening in the earth; a cave; also, an artificial recess, cave, or cavernlike apartment.

Source: Webster’s Unabridged Dictionary 1913 Edition