This is an interesting site accessible from the Napili side of the island. The large parking area can get filled up, but if you wait a moment someone will pull out as most people don't spend extended time at this site. It's a short, but rugged, hike down to the blow hole with warning signs about getting too close to the blow hole because you can get sucked in or loose your footing or large waves can wash over the lava. It's best to observe the blowhole from a safe, elevated distance. Check the tides http://www.hawaiitides.com/MauiTides.asp
