There are a bunch of nice spots near Port Allen where our boat was harbored. One we particularly enjoyed was "Hale O'Hona" or home of the turtles. Tons of turtles about waiting to get cleaned by the surgeonfish.
If you are willing to spend the time and money on an all-day excursion, I recommend Mana Crack around the western tip of the island along the Na-Pali coast and another to Ni'ihau, a small island to the west of Kauai. Give me a minute and I'll go snaffle a few picks I posted on WUS....
There, a Galapagos Shark at a spot on Ni'ihau called Vertical Awareness:
This is why they call it Vertical Awareness:
Looking up from the same place:
Another dive, this swim-thru aptly named TV Cave:
Click to expand...