It really, really doesn't get more magical than this. A private island with over water bungalows? They'll even create a special Polynesian ceremony for you!
This is part of a stretch called the "Highway of Waterfalls". The name for this one translates to "Devil's Cauldron" which is enough to keep me from going to the edge!
Stopping at the overlooks on both sides of the bridge is always fun and awe-inspiring! Then, drop down to Sausalito for a nice lunch on the Bay, gelato afterwards, and then onwards with the road trip...
I would recommend you come to the Blue Lagoon directly from the airport if your flight arrives at 7,8,9 in the morning. Hotel Check-in is not until 3pm and this place will relax your mind a body from the over night flight.