Arin Waterfalls, Urco Ruins & Andean Zipline Tour Explore the Sacred Ruins of Urco, visit Arin's traditional Chicheria, trek to waterfalls, and zipline in the Andes. Incan Caves and Sacred Ruins of Urco Tour Uncover the mystery of ancient Incan ceremonial sites and enjoy breathtaking views of Ollantaytambo and a scenic waterfall trek.