Hold of the Sea Princes campaign which largely revolved around the south seas including the Olman Isles. The article entitled The Last Respite should make a unique destination for any adventuring group that sails the waters of the Flanaess:
"The free port of Narisban, found in the tropical Olman Island chain is a crossroads for intrepid traders and pirates who ply the high seas. Given the remote location of Narisban, nearly every sailor that visits its harbor seeks a respite from the sea for it might be their last."
In case you missed the previous installments just go back and check these posts as well. Enjoy!