Sit and enjoy the water or take a stroll at Muri Lagoon. It's a serene way to start or end the day.
You're spoiled for sightseeing choice in Rarotonga. Muri Lagoon is a good place to begin here, but there are plenty of other worthwhile sights to enjoy. Muri Beach, Aroa Beach, and Tikioki Marine Sanctuary are close to the area of shallow water and will round out your day nicely.