Zoo, cave tubing, zip lines, Lamanai, reef fishing, flats (fly) fishing, Caye Caulker day rip and The Lazy Lizard, gold carting from south to north exploring, exploring the lagoon side,SCUBA, and yes lots of snorkeling too.
Coppola has 3 resorts on the mainland and then there's "The Private Island" that would be a really great Honeymoon stay. There is a LOT to do here, just hook up with one of the good excursion operators like Carlos at Suya Tours about 2 miles south of town.
Bob