All trails are well-kept and are really well-marked. You are given a detailed trail map when you check in to the lodge. There is even an 800-meter wheelchair-accessible paved trail that goes from the lodge into the rainforest in a loop that finishes by the spa and swimming pool area. The Arenal Observatory Lodge offers guests complimentary walks every morning at 8:30 a.m., led by their expert naturalist guides.
Birders will be particularly delighted, as the diverse habitats surrounding the volcano lodge shelter nearly 400 species. Birds can be seen everywhere! The gardens and landscaping are extravagant with color, carefully chosen to attract wildlife. Jewel-toned hummingbirds dart between heliconias and brilliant butterflies adorn blooming flowers. Toucans are plentiful, and it is common to see a rambling coati stealing a papaya from one of the many trees.
On a walk along the Waterfall Trail, we saw a beautiful venomous oropel (pit viper) snake, an anteater patiently climbing a tree (in the rain, I might add!), and heard a large group of howler monkeys not far off. The thundering waterfall was really impressive.