The tour into Sirena in the heart of Corcovado National Park in Osa Peninsula. Sirena is a ranger station and park entrance located right in the very heart of Corcovado National Park. Along with Rio Madrigal, it is the best place for wildlife observation. Chances are to spot Jaguars, Tapirs, Monkeys of three types, many birds, insects, mammals, bull sharks, ocelots, crocodiles and many more. Sirena Ranger Station is a wild place, ideal for people that which to explore the true and unexplored heart of this unique and world renown national park. The tour into Sirena in Corcovado does not leave all the hotels, and you have to contact us in advance for reservations. It is well worth the time and money , a truly unique tour.