Costa Maya (Mahahual), Mexico - My favorite thing to do in Costa Maya is sailing away.
Cozumel, Mexico - We visited San Gervasio ruins for a nice day, but I wish I'd opted for Tulum instead.
Roatan (Isla Roatan), Bay Islands, Honduras - Clear water, excellent weather and nice people.
Tampa, Florida - Traffic in Tampa is pretty bad - even on Saturday and Sunday. We visited Tarpon Springs for a sponge tour and some Greek food and were well pleased.
Belize City, Belize - Belize City of course is a dangerous place, but we took a boat ride upriver to Burrell Boom and Altun Ha which was really great!