Hawaii- Big Island

The diving in Kealakekua Bay is interesting. Lots of freshwater offshore springs has an interesting visual effect. It’s where Cook was killed. Read up on where and where not to go: there’s some culturally sensitive sites on the cliffs for instance.

Convenient to Kailua-Kona. The shoreline counterclockwise from there was terrific.

ETA: I really liked the University of Hawaii maps. But they appear to have gone out of print under that name at any rate. Wilderness Press, in the past had useful hiking guides.