A cave abyss with a vertical depth of 75 meters, orifice opening 20×12 meters and floor dimensions 50×30 meters. It is located about 2.5 km n. from the village of Karavomylos, near the rural road Karavomylos – pre-earthquake village of Livathinaton. In the lower part of the cave abyss holds brackish water, about four meters deep. The first attempt to explore Ag. Eleousa, was made by the members of the Hellenic Speleological Society (ESS) Ioannis and Anna Petrocheilou and G. Montesanto, in 1951. An attempt was unsuccessful, due to lack of technical means. The second attempt was made in June 1959 by the aforementioned speleologists and also speleologist A. Douna. However, the change that the abyss had suffered from the earthquakes of 1953, (The seabed, had receded an additional 30 meters), made the exploration unsuccessful again, despite the additional technical equipment that the speleologists brought with them. Finally in June 1966, during the Greek-Czechoslovak Meeting of Speleological content, which was organized by the EWC. , exploration made possible! The abyss cave is open, in limestone rocks, it has been created by erosions and precipitations, and it has a pithoid shape (jar). Around its mouth, there is a dense cluster of trees and shrubs… that make it invisible! The abyss cave of Agia Eleousa in Karavomylos is not suitable for tourist exploitation, but due to its impressive depth and the flora that surrounds it, it can be mentioned as a tourist element of the wider area. Today the mouth of the abyss is closed around the perimeter, to avoid an accident. Given the opportunity, you should not miss to visit Melissani Cave, a memorable sight that causes awe.