夏威夷

1. Kauai
a. Na Pali coast is accessible through trail at the north end if you have 2 day time for an intensive hiking.
b. Waimea Canyon can only be seen in the morning, cloud will cover the entire canyon from late morning.
2. Oahu
a. The best beach is near Lanikai on the southeast corner.
b. North shore has the biggest waves.
3. Maui
a. Hana hwy is not that scary, definitely worth the drive, you can get there and come back through south side within a day if you start early and you have plenty of time to stop by at each place along it. Some rental companies dont allow you to drive on the southside, but the road is not that bad at all even for a subcompact car.
b. The best snorkeling place is near the moon-shape island, Molokini. Boat service from Maui is available.