Though the Dunn River Falls is a very small waterfall, the climb up is fun. One does not have to be very adventurous or have a high fitness level to be able to climb the falls. The guide supplied us with water shoes and led us up the falls in a human chain. It is a little slippery in places where the water flows with some force, but it's nothing you cannot manage. We had people in our group who made the climb carrying infants on their backs/shoulders!
There were little niches from where we could get off the track if we wanted to. At the end of the climb, there is a little natural water slide where you can slide down the rock into a natural little pool. There's also an pit-like area where you can sit down and where the water hits you in all directions, like a Jacuzzi.
If you are in Ocho Rios, this is one activity not to be missed.