Things to Do in Maui in 2026 – Tours & Activities | HawaiiActivities.com Wailuku on the northwest side of Maui is home to the state-of-the-art Maui Ocean Center, a renowned marine park that fosters understanding, wonder and respect for Hawaii's marine life. This center contains the largest collection of spectacular live coral displays in the U.S., and seeks to teach visitors about Hawaii's natural history and cultural heritage. Facilities feature elusive garden eels, lion fish, green sea turtles, sharks, rays, and more.