Some of the caves, including the Benagil cave, are domed with openings in the rock allowing sunlight to stream through and light up the water. Some of the caves are narrow, deep channels while others are wider caves with high ceilings. You are not allowed to disembark in the caves but from the boats you have the best viewing points.

Only smaller boats can explore the caves at will. Carvoeiro Caves has a fleet of 6 small, modern boats that zip along the coast and can easily be manoeuvred. All the boats have an easy boarding system making them accessible to the mobility impaired. There is no wading through waist-high water before clambering aboard. Also all boats are equipped with all safety gear as required by law.