You could miss this place, since it's small and almost hidden. It's well worth a visit (especially on Mondays, when Manuel Antonio is closed). It's directly across the road from the Si Como No hotel, and has a sign associated with Manuel Antonio. Take a guided tour. We had a wonderful guide, Emilio, whose enthusiasm and knowledge made this one of the highlights of our trip. They also offer a night tour. The day and night tours are completely different -- it's worth it to do both.
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