Complex sentence: In Parga's bay, between the town beach and the harbour, there is an islet on which is a chapel and jetty, the island can be easily visited by swimming the short distance from the town beach.
Split into simpler sentences: In Parga's bay, between the town beach and the harbour, there is an islet on which is a chapel and jetty. The island can be easily visited by swimming the short distance from the town beach.