These are ancient rock tombs carved into the mountainside. I spotted them from the boat as we were returning from the islands tour. There wasn't a lot of signs, but we found our way there. They date back to about 4th century B.C. Historians think the larger tomb was for a public official or leader. The largest one was pretty impressive. It was separate from the others and majestically overlooked the city. Some of them were at street level and you could look inside. It was a little creepy but neat to see something this old!