If you've heard whispers of a waterfall, it was likely this: Cascada Sol del Mayo, located at the base of a canyon within the Rancho Ecológico Sol de Mayo, just outside of the town of Santiago. It's a bit of a journey to reach, but it's a fun adventure for active travelers. First, head down a long dirt road from the Mirador Santiago de Yola, a small observation platform overlooking Santiago's lagoons and palm groves; you'll likely lose cell reception, but it's hard to get lost (download the route on Google Maps ahead of time if you'd like the reassurance). Once you reach the ranch, you'll need to pay an entrance fee, and it's a short but steep hike down into the canyon. You'll be rewarded halfway with a view of the twinkling green swimming hole and dainty but powerful cascade. The crystal clear, freshwater pool is incredibly refreshing (especially after that descent on a warm day) and has pockets both deep (nice for jumping) and shallow (nice for standing or floating).