Here's a pretty sweet cave diving video with GUE Diver Elena Konstantinou and friends. This particular cave is located in the Northwest part of Sardinia, Italy and is considered to some as one of the best cave diving destinations in the Mediterranean Sea. You'll find huge limestone cliffs with over 300 caves above and below water. One of the deepest fresh water caves can be found here reaching more than 360 feet in depth.

Elena Konstantinou - Facebook