Cave is a synonym for grotto.
Grotto maps are randomly named and placed, no one can ever tell you where the grotto is by just name alone.
Grotto locations and names are randomised, there are about 100 different spots where they can appear, but you cannot work out a grotto's location from its name, because both are randomly generated. Instead you need to find a FAQ that shows the maps of every region, work out which your map shows, which will then reveal the location of the grotto on the world map.
Back to the Grotto was created in 1992.
Grotto Salamander was created in 1892.
Jeita Grotto, Baalbek, Beiteddine, Byblos ...
A small cave is often referred to as a grotto or a cavern.
The scientific or taxonomic name would be Eurycea spelaea.
The Ghost of the Grotto has 26 pages.
The duration of Grotto Geyser is 10 hours.
Waitomo.
A grotto is a small picturesque cave, usually in a garden or park.