Cavtat’s Šipun Cave, in the northeastern part of the peninsula Rat in Cavtat, has been protected as a geomorphologic natural monument since 1963.
With biospeleology research, which has lasted, with interruptions, since the late 19th century until today, a significant type of cave fauna has been established. In it, more than 60 organisms are described, which is the largest number of described species in a cave in Croatia.
Šipun is known for its spacious indoor cave and great hall with icicle clusters, the most attractive of which bears the name of St. Vlaho.
Šipun Cave in Cavtat was renovated within the project "Nature for the Future" which was financed from the EU's program of Croatian and Montenegrin cross-border collaboration.