Waitomo is a small rural area in the Waikato region of New Zealand's North Island, famous for its network of limestone caves. The Waitomo Glowworm Cave is the main draw — a boat ride through an underground grotto lit by thousands of bioluminescent larvae clinging to the ceiling is one of New Zealand's most iconic experiences. The Waitomo Caves Discovery Centre in the village explains the geology and ecology of the cave systems and is a good first stop.
Beyond the glowworm caves, Waitomo offers more adventurous caving: black-water rafting — floating through underground rivers on rubber inner tubes — is the most popular alternative, with both beginner and advanced versions available. For serious cavers, Gardner's Gut is an extensive and little-visited cave system accessible only on guided expeditions. Above ground the rolling green farmland is pleasant but unremarkable — this is a place where the real action is beneath your feet.