You can go on a tour of Zante by boat, but in case you do it is best to choose one of the largest boats that depart from the harbor of Zante. If you do not want to waste an entire day on a tour of the entire island, you can take the boat that goes to Navagio, or the Blue Caves, or Marathonisi (an island in Lagana Bay), or a combination of those. Some of the boats have glass bottoms in order to provide a better view. If you are lucky, you may even see a Caretta-Caretta from up close.