It is a fascinating place, and it's a region I haven't paid enough attention to I think. Maybe it's because it's so late in the campaign and I'm usually ready to push on to the next difficulty. But the island is deceptively large - there's actually a lot to explore here if you count the treetop city and the ruins in the mountains, not to mention the huge dungeon that's half the size of the entire island.
One thing I noticed is a lot of interesting statues, shrines, and altars. The Dryad culture seems to borrow elements and designs from Aztecs and other ancient Central American civilizations. A lot of them are bloody and otherwise pretty sinister. There's also a statue that kind of reminds me of a vampire! Anyway, here's my photo album of them: