The Blue Grotto - Several sea caves and caverns on the south east coast of Malta. They became famous because combination sun, sea and geographic location produce numerous shades of blue on the caves walls and dark blue on the sea. It's great location for boat trips, snorkeling and diving. This location been used in popular culture and movies like: Hell Boats, Troy, Cadbury Milk Tray and much more. Caves are open full year, expect when weather and security reason close it.