If you are visiting Maui during the whale season (mid December – mid April) take a whale watching cruise. It is absolutely amazing to see a hump back whale up close.
When you are out cruising around you will get good at seeing a lot of blows in the distance. This is when a whale just surfaces and exhales causing the water to blow in the air. Once in awhile if you are looking in the right place at the right time you will get to see a breach. This is when the whale jumps completely out of the water and then comes crashing back down.
You will find a lot of companies offering whale watching tours, such as the popular whale watching tour from Lahaina, just do some research on each company to find out which one will offer you the best price for what you are looking for.
Again these cruises go out on the open ocean and at times the waves can get pretty good sized. So if you are a person that gets sea sick, be sure to take something to avoid the motion sickness. You will enjoy the whale watching cruise more if you are not sick.
Snorkeling is another great way to enjoy the beauty of Maui’s waters. There are many snorkel sites around the island. One of my favorite spots is Molokini Crater where you can snorkel among sea caves.
Maui has numerous hiking trails that offer spectacular views of its natural surroundings. My personal favorites include Haleakala National Park, Wailea-Kula, and Makena State Parks.