A rugged, once forested island with a tradition of seamanship, Chios is also famous for its yearly production of mastic, a resin from a bushy tree of the pistachio family, from a group of traditional villages. Its flavours are being added to icecream, and chewing gum, to name a few uses. There are any number of small bays and villages to explore around the coastline, and geological marvels such as the 150 million year od cave of Sykias Olimbon, and Byzantine mosaics. The ferry to Cesme on the opposite shore of Turkey leaves Chios town and harbour, as do ferries for Lesbos, Kos, Rhodes and Athens. There is also a very small airport with flights to other islands.