The Rojas Bonilla family has created this wild frog sanctuary, home to some 35 species of croaking critters. The frogs are just the beginning of this night walk, which continues into the rainforest to see what other nocturnal animals await. If you’re more of a morning person, it also does a birdwatching tour. Reservations recommended. Located 3km from La Fortuna’s center; hotel pick-up costs US$10.

This is part of the Arenal Oasis hotel, located just southwest of town on the way to the waterfall.