The western coast of Paxos abounds in sea caves, some of them are so big that cruise boats and ships can easily go inside (like Ypapandi cave). They can be reached only by sea and in order to see them, you can take advantage of the organized daily boat trips or rent a boat and visit the canes yourselves. The most popular cluster of sea caves on the island near Erimitis beach and all boats and ships stop here for swimming and rest. The sea water around the caves is vivid blue and thus they call them "the blue caves".