Two routes exist to arrive: Santa Cruz-Belén-Matapalo-Huacas-Playa Grande, of 52 km. Also Liberia-Guardia-Filadelfia-Matapalo-Huacas-Playa Grande, 70 km. This park protects to Playa Grande, one of the most important sites of the planet for laying eggs of the baula turtle. The Baula, greater turtle of the world, gets to measure two meters and a half of length and weight more than 700 kg; dark color, it is the only turtle that instead of shell has a very heavy skin, of similar appearance to the leather. It's easily identifiable by his very extended front fins. He is nomadic and their poisonous favorite food is medusas.

Baulas passes their life in waters of the tropical seas and temperings. They only leave the sea and goes to earth for laying its eggs, from November to April. They dig a nest of 1 meter. of deep, which covers after putting their eggs. When the new turtles are born, after 60 to 90 days, the small turtles try to cross the 70 meters. That separate them from the sea, but often are imprisoned easy of crabs, marine birds and other animals, reason why just a few of them survive.

Also in Playa Grande some lora turtles occasionally, lay its eggs. Another interesting place, in the Park, is the Tamarindo mangrove, with 440 he, in which great amounts of the slime and clays have been deposited. In this precious mangrove we can find the 6 species of mangroves own of the pacific coast: two species of salty mangrove, the mariquita, the red one, piñuela and botoncillo.