Float through greenish-blue limestone canyons, swim into caves with flowstone formations, and finish at a hidden forest spring. This full-day river trekking and caving tour blends geology, local culture, and hands-on adventure for physically fit travelers.
More ways to explore the area's outdoor wonders
A cool river breeze meets limestone as the group slips into green-blue pools, the canyon walls closing in like pages of a book written in rock. Early light filters through the tropical canopy and the river dares you downstream — swim, float, and scramble through narrow passages where water has carved tunnels and caverns over millennia.
Difficulty
challenging
Duration
7–8 hours
Fitness Level
Requires high level of cardiovascular fitness, balance, and flexibility; comfortable swimming ability for short sections.
Wildlife
History
The region sits on Puerto Rico's karst limestone belt; caves here were used by indigenous Taíno people and have long been features in local folklore and subsistence.
Conservation
Cave ecosystems are fragile—stick to guided routes, avoid touching speleothems, pack out trash, and use reef-safe sunscreen to protect downstream habitats.
Reserve your spot on the Arenales River Caving, Waterfall &Tropical Forest Secret Spring today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Wear closed, sturdy water shoes
Expect slippery limestone and river rock—closed shoes with good tread protect feet and improve traction.
Bring a dry bag for electronics
Phones and cameras get wet; a small dry bag keeps essentials safe during swims and floats.
Hydrate and pace yourself
This is a long, physically demanding day—drink before and after river sections and rest when guides do.
Respect cave wildlife
Avoid flash photography and touching flowstones; bats and cave formations are sensitive to disturbance.
Closed-toe water/hiking shoes
Protects feet on slippery limestone and provides grip for river trekking.
Lightweight dry bag (10L)
Keeps phone, extra layers, and snacks dry during swims and cascades.
Quick-dry clothing or swimsuit with rash guard
Dries fast and protects from sun and scrapes on rock surfaces.
summer
Small first-aid kit and blister supplies
Useful for minor cuts or blisters after full-day river hiking.