The guided tour of the Glowworm Cave, which is behind the visitor centre, leads past impressive stalactites and stalagmites into a large cavern known as the Cathedral. The highlight comes at the tour’s end when you board a boat and swing off onto the river. As your eyes grow accustomed to the dark you’ll see a Milky Way of little lights surrounding you – these are the glowworms. Book your tour at the visitor centre.
The acoustics are so good that Dame Kiri Te Kanawa and the Vienna Boys Choir have given concerts here.