Come and see why National Geographic does yearly studies on one of the most important nesting sites for Leatherback Turtles. These turtles can reach up to 16 feet from head to tail and over two tons in weight. These turtle come to shore each year to lay there eggs under the moonlight and it is truly one of the most remarkable experiences you will have while in Costa Rica. TOUR DESCRIPTION The turtle guides will take you to Playa Grande, world renowned for these Leatherback Turtles. Your adventure begins in the front lobby of Hotel Tamarindo Diria and depending on turtle sites, times will vary. These tours are usually between November and February each year.