This cavern has been described as the most impressive limnetic cavern of the whole world. It consists of three different caverns: theAlepotripae, Katafygi and Vlyxada that is the only one that is open for visits. Those caverns were first explored in 1950 from the famous couple of speleologists Petroxeilou. You can explore the inside of the cavern with little boats along with the boatman showing you around and giving you information about the history of the cavern.