Bailey Museum is on the way to Iao Valley. It's well worth a stop, but it's easy to miss the relatively small sign at bend in the road. We've always parked on the street, but there is a small parking lot in front of the museum.
We've never actually been inside, but we love this place! It's closed on Sundays, our normal day for an outing to Iao Valley. But the grounds are open and the features are labelled so you get a great cultural experience just form wandering the grounds. You will enter under the wide canopy of a giant mango tree. If it's fruiting you'll see smashed mangos strewn about. There is a large pohaku under the tree that is covered in bird guano.