We visited the Arenal Suspended Bridges on our own, and didn't see many animals, but that may have been because we didn't have a guide with us to point them out to us. We did enjoy the hike through the forest, but found the trails to be bumpy and hard to walk on. The path is made of paving stones which are rather uneven and I was so busy watching my foot steps, that I missed looking up at the scenery. However, my family really enjoyed the hike! It took us about 1 1/2 hours as we hiked it fairly quickly, and just as we were completing the trail, the rain just started. Thankfully we took a photo of the volcano from the viewpoint behind the visitor booth BEFORE we started the hike. We got awesome photos with the top of the volcano....when we finished the hike later in the afternoon (around 3:00 pm), the rain clouds had rolled in, and the upper 1/3 of the volcano was covered in rain cloud. The cost is about $24.00 per person, and our kids....who are in their early 20's brought their student cards....and we got a reduced price from that. During rainy season, I would suggest hiking it in the morning or early afternoon before the afternoon showers.