Explore the flora & fauna

Cloud Forest

Tour Guide Oscar Castillo
Tour Guide

Oscar Castillo

My name is Oscar Castillo, 10 years ago I came to Monteverde to apply for a job, at that time I already finished my school to be a naturalist guide (Certified as a professional bilingual naturalistic guide by the Costa Rican tourism board license number 1090).
Since then I have worked for some leading institutions in fields such as ecotourism, conservation, and environmental education.

About Us
Nasua Tours Monteverde

Our Tours


Bird Watching

The birding tour last around 5 hours walking through Monteverde´s reserve (Curi-Cancha Reserve or Monteverde Cloud foreste Biological Reserve). The tour is recommended for...See more

Daily Natural History Walk

If you are interested in learning and discovering the secrets that nature has to offer the natural history walk is perfect. It takes approximately three hours...See more

Night Tour

At dusk, most of the diurnal Fauna looks for the best place to rest. But, it is also the time when nocturnal creatures begin to appear...See more

Full Day

This tour was designed for nature lovers, for people that loves to spend the whole day long in Nature walking, finding, learning about...See more

Private Guided Tour

We also offer private tours. If you want to enjoy the convenience of a tour for your family or friends without worrying about more people, you...See more

Need Help Booking?

You can submit your Reservation Request here. If you are having problems booking you can directly email us at info@nasuatours.com or call us +(506) 83136679.


People saying

This was one of the best eco-tours I’ve taken to date. Oscar is a first-rate guide, highly knowledgeable about indigenous wildlife and flora of Costa Rica and Monteverde, and about the specific preserves where you might be able to find specific species you might be hoping to see as well. He’s also just an all-around great person to spend a great day with, and he works really hard to make sure you get the most from your time with him. Highly recommend Oscar!

Josh Pelta-Heller


We booked a night tour and spotted many animals that otherwise we would have never seen. We got to know Oscar as an intelligent, friendly, interested person, with whom we had great conversations with. He is really knowledgeable and has many years of experience in his field. Really cares of providing the best, so passionate about what he does.
We would definitely recommend to take a tour with him 🙂
Thanks Nasua Tours! 🙂

Dora & Peter


Oscar is a gentleman and a scholar. He guided my wife and I on a birding tour thru Curi Cancha Preserve in Feb 2020 and we highly, highly recommend!

He taught us so much not only about birds, their songs and sounds, but also about the flora & fauna of the area as well. His passion was evident from the start of our trip and you can tell from his encounters with the other guides that he is highly respected amongst his peers. Thank you!

Colin Cowing

Certificate of Excellence


See what other people are saying about us and reviewing on Tripadvisor.

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© 2022 Nasua Tours Monteverde. All Rights Reserved.

Web Development

© 2022 Nasua Tours Monteverde. All Rights Reserved.

Web Development GLOB COSTA RICA

© 2022 Nasua Tours Monteverde.
All Rights Reserved.