Glow with the flow on black-water rafting trips deep into the glowworm-filled Nile River Caves (adult/child $190/150, four hours). This friendly operator also runs cave excursions without rafting (adult/child $125/90). Short on time? Take the rainforest train ride (adult/child $25/20), a 1½-hour return journey departing two or three times daily. The Adventure Caving trip ($375, five hours) includes a 40m abseil into Te Tahi cave system, with rock squeezes, waterfalls, fossils and trippy cave formations.
Kids aged 10 and over can raft, while the cave tours suit anyone who can walk on slippery surfaces for a couple of hours.