Grotto This site is adjacent to Bonito Island 5m.-18m./16ft.-60ft. in depth, approximately 19 minutes by banca boat from the resort. Slight to moderate current, visibility is about 10m./30ft. a the way of dive here can be one way or return to the boat depends on the current. Grotto has lots of big small pennacle rocks coated of soft and hard corals, such as big basket corals and soft sponges. the site is ideal for underwater photography using wide lense.