So, I took my first trip to Hawaii this past week, traveling on the roads of Maui. That's what made me most excited to go there, lol.
Anyway, we made a complete loop around the west part of the island, including on Hwy 340, which is much sharper and narrower than the famous road to Hana. We did that as a spur of the moment type of thing, after having tried to go see the Iao Needle, only to discover that the road to it was closed from flooding. So we decided to head back to our condo near Napili via Hwy 340 around the northern part of the island, on a route that is far more curvy, far narrower (it was the width of a driveway at one point), but far more scenic than the road to Hana since it hugged the coastline more. (of course, that freaked my mom out more being on the edge of the cliff) Unfortunately, since most of that highway is just a county road and not a state highway (makes sense, right?), it's not going to show up as a complete loop on the map here.
We also went up Haleakala, and did many of the other touristy things, including the road to Hana, as well as snorkeling and going on a zipline (fun!).