I went to Manini Owali beach at Kua Bay with the intent of doing aerial panoramas rather than a synth, but I got such a nice set of images, I had to see how well it worked out.
These were done using a new approach to aerial panoramas that really should lend itself well to Photosynth.
Manini Owali beach at Kua Bay is an increasingly popular spot to go swimming, snorkeling, boogie boarding, and just to hang out. I got there early enough the beach was almost empty, but it began to fill up as the day went on. It's not as devoid of human presence as, say, my Kiholo Bay synths.
Manini Owali beach is also a historic site where ancient Hawaiians dwelt, so you may well see ruins in the lava. It's worth poking around through the images. (Please don't poke around on foot. Historic sites like this are incredibly fragile and easy to destroy!)