Ocho Rios Super Saver: Green Grotto Caves plus Dunn's River Falls. Discover Dunn's River Falls and the Green Grotto Caves, two of Northern Jamaica's most popular natural attractions, during this combined tour. On this 5.5-hour excursion from Ocho Rios, visit the Green Grotto Caves first to see a subterranean lake and impressive natural limestone rock formations. Head to Dunn's River Falls to climb, play and swim – or just relax on the sundeck. Enjoy round-trip transportation from your Ocho Rios hotel. Book and Save 24% Off Ocho Rios Super Saver: Green Grotto Caves plus Dunn's River Falls.