Rather than taking a land tour with our cruise ship we chose Viator. It was the best decision we made and it turned out to be the highlight of our trip. Our tour guide, Victoria, was extremely knowledgeable , caring and patient. We were about 15 adultsmostly Seniors, who were not to swift on our feet. We never had to wait to enter any of the sites, we did not have to purchase a Visa and never felt rushed. We all loved Victoria!!! I do recommend that an extra gratuity, in this case, is highly recommended