Spend your time in the water. Purchase a mask, fins and a snorkel or bring your own. Go diving. Go to the Dolphin Academy. Christoffel National Park isn't really worth it. The ancient rock drawings look fake and the caves are very dark and dangerous to walk in because of the uneven ground. Be careful where and what you eat. Oh there is a super huge Super Market that you can rent a car and stock up on groceries.