Lahaina. Has the largest Banyan tree in the U.S. – and it’s sitting right in the middle of town! It’s really something special that you should check out.
Ioa Valley. Don’t plan a whole day for this small park. It’s pretty to see, but not much to do. It’s not too far out of the way, so just take a quick look and move on. Tip: Park on the street. The parking lot costs $5 for the day whereas the street is completely free, legal, and literally one meter from the paid parking. Also, you won’t need more than 45 minutes to see everything in the park.