Cren is a local tour company that offers awesome trips on a daily basis. Me and my wife were looking for something different, not the traditional cattle-type tourism trips with one tour guide for 20 + people. Our guide Ronald took us to Carara National Park, near Manuel Antonio. The park is amazing. We saw over 20 crocodiles, three of them extremely large. After, we went for a guided hike into the rainforest and saw the wonderful Scarlet Macaws. The day after, Ronald took us to Tortuguero National Park. We left early in the morning at around 6 and returned at around 6 PM. We explored the canals and lagoons of the park, and went for a hike in the rainforest too. Unfortunately we did not see any sea turtles, but is was off seasons ( July to September are much better for turtle trips ).A short stop at Braulio Carrillo National Park ( endless jungles) was also included. All in all we were pleasantly surprised with the company. The tours were very affordable ( The Carara One Day Trip costs 95 U$ ) and the Tortuguero Trip costs U$ 90 per person. The company has their own vans and guides. Ronald for instance spoke perfect English and had vast knowledge of nature, natural history and else + he is a very fun guy. Overnight trips are also available, although we did not have enough time. One can book the Tortuguero overnight package, Corcovado National Park overnight ( Corcovado is a fabulous destination located in the Osa Peninsula ) but we lacked the time for. Highly recommended company & and a very personalized service. Private customized trips are also available to other destinations.