Zante, (Zakynthos in Greek) lies in the easter part of the Ionian sea, west of Greek mainland. It is the third largest of the Ionian Islands. It covers an area of 158 sq mi and its coastline is roughly 76 mi in length. Zakynthos has a thriving tourism industry. The most famous landmark of the island is the Navagio beach. It is a cove on the shore, isolated by high cliffs and accessible only by boat. The beach and sea floor are made of white pebbles, and surrounded by turquoise waters. Numerous "Blue Caves", are cut into cliffs around Cape Skinari, and accessible only by small boats. Keri is located in the far south of the island. It is a mountain village and has a lighthouse in the south. The largest resort is Laganas. Small Xigia beach in the north is noted for its underwater springs rich in sulphur. Bochali hill above the Zakynthos town contains a small venetian castle, and offers panoramic views onto the town. Marathonissi (also known as "Turtle Island), an islet near Limni Keriou is a small paradise, with tropical vegetation, turquoise water beaches and sea caves.