El Castillo-Arenal Butterfly Conservatory
- Location : El Castillo, a small town on the eastern end of Lake Arenal
- Hours : Open daily from 8 a.m. to 4 p.m.
- Telephone : 2479-1149 or 8306-7390
- Entrance Fee : $14 adults, $10 children
El Castillo-Arenal Butterfly Conservatory covers four different atriums filled with 30 different species of butterflies. Each atrium leads guests through a unique section of the rainforest where guests can experience the butterflies in their natural habitats. Self-guided tours last about an hour and a half taking guests through all four atriums, a frog habitat, a plant regeneration nursery, and on the trails and pathways around the gardens.read more close