Te Anau-Au Caves - A boat trip and guided tour into the Aurora Caves system by walking path and small boats within the cave itself where you will see thousands of glowworms. The caves are only accessible by boat, and Real Journeys operates a quality catamaran for a 30 minute cruise each way. You spend approximately 35 minutes underground, where you will see some spectacular underground waterfalls, some high ceilings, and many other interesting things with a professional guide. Suitable for everyone except infants. Be aware you will need to bend over considerably at the entrance, only 1 meter high for 3-4 meters. $63/adult, $20/child, although promotions often apply. Approximately 2 and 1/4 hours total.