You might notice that the address for the Blue Iguana Bar is on Harborside Drive in Galveston. But technically, the Blue Iguana is located on the Carnival Vista which currently sails out of Galveston to Cozumel, Honduras, and Belize, so access is limited to the 7 days you are cruising. For fun we decided to try a margarita on the Vista. We chose the Blue Patron Margarita, which was not blue, but had a heavy pour of Patron Silver, with Triple Sec (not our favorite), and fresh lime juice. The blend was perfect, and the bartender was great! If the Triple Sec was replaced, this could be a 5 margarita glass rating. But we still give it 4 1/2 margarita glasses. Bon voyage!