Haleakala is Maui’s active volcano, but don’t worry it will not erupt. It merely produces smoke at some locations. The view from Haleakala is imposant and stretches to the neighbor islands. Haleakala does provide for one of the more epic sunrises with many visitors counting it as one of the more unique experiences of their lives.
Molokini is an amazing site to really experience the Pacific. This crescent shaped island is the caldera of an old volcano and is situated off the coast of Maui. It provides for one of the more unusual snorkling and diving experiences: (https://www.snorkelmolokini.com/) has multiple adventures starting at $140 USD for 3-hours.
Iao Valley State Park
Hiking is unbeatable in Hawaii. Maui is no exception with its epic Iao needle. This valley offers hikes on different levels and provides stellar views of its needle sharp ridges (https://mauiguidebook.com/central-maui/iao-valley-state-park/). Make sure you pack enough water.
The best way to see the magnificent beauty of Maui and its neighboring islands is via helicopter. Helicopter companies such as Air Maui offer a selection of tours over Maui and even to other islands such as along the highest sea cliffs in the world on neighboring Molokai (https://www.airmaui.com/complete-island-helicopter-tour). Some tours are 1 Hr for $330 USD.
Maui Ocean Center
The Maui Ocean center (https://mauioceancenter.com/) seeks to foster understanding, wonder, and respect for marine life. Only 30 minutes away from the conference hotel and well worth the trip. It gives you insights into all the marine life you can find around the Hawaiian islands.