I need to know either a beach or costal feature in Italy close to Mt. Etna?

Answer 1

http://www.worldatlas.com/webimage/countrys/europe/sicily.htm This has a map of Sicily, including Mt. Etna. If you need a coastal feature, you might consider the Messina Straits, the body of water separating Sicily from mainland Italy.

Answer 2

There are a number of beaches just to the east of Mt. Etna, around the town of Taormina, including Lido Mazzaro and Mondello. There are a few resorts in that area as well, as well as more beaches further out to the north and south.