Provided that you're fit and willing to deal with a long and slippery path, an adventurous guided trip (three hours) to the spectacular Salto el Limón Waterfall is a delight. It's mostly on horseback, but includes walking down rocky, sometimes muddy trails. Horse paths are slippery, and the trek is strenuous. The well-mannered horses take you across two rivers and up mountains to El Limón, the 165-foot waterfall amid luxuriant vegetation. Some snacks and drinks are usually included, but a grilled chicken lunch is only a few more pesos. The outpost for the trek, a local guide service called Santi Rancho, is difficult to find; it's best to arrange a tour from a professional operator like Flora Tours in Las Terrenas. Their price remains a reasonable $50.
Santi Rancho, Limon, 32000, Dominican Republic