The day begins before the sun opens fully over the Pacific: an air‑conditioned shuttle slides out of Tamarindo and into a landscape that changes every kilometer — cacti and scrub give way to dense, green forest where humidity hangs like breath. A bilingual guide checks names, hands out binoculars and points to a thin blue ribbon on the map: the river that will lead to the waterfall. On the trail, birds call from the canopy and leaves slap softly in the wake of passing hikers. The river dares you closer with a cool, steady hiss; the waterfall greets you with that low, elemental roar that announces the geometry of rock and time.