Black Rock at the northern tip of Kaanapali beach is a great place to learn how to snorkel with easy access, lots of fish close to shore and typically calm ocean waters. Although popular and busy, there's usually still plenty of room to maneuver in the water. There are times when the ocean is too rough here, so use your judgement. Also, be careful to stay close to shore - don't venture into deep water or swim around the edge of the rock outcropping where strong currents can form..