A rocky outcrop or fountain house, either natural or artificially made, which supplies water. The sites were dedicated to the Nymphs.
a grotto with a natural water supply dedicated to the nymphs; by extension, an artificial grotto or fountain building
a decorative fountain or artificial grotto
A grotto or shrine, usually composed of fountains supposedly the home of the nymphs. A pond with (white) water lilies
Roman shrine dedicated to a nymph. Usually a niche with a fountain in front, but developed to include a whole room with monumental fountain