The Waitomo Glowworm Caves are a famous natural wonder located on the North Island of New Zealand. These caves are renowned for their unique bioluminescent display created by thousands of tiny glowworms that illuminate the dark underground passages. The highlight of the Waitomo Glowworm Caves is the Glowworm Grotto, where visitors can witness a breathtaking spectacle of twinkling blue lights. Most visitors experience the glowworms from a small boat, gently gliding through the underground river that flows through the caverns. The boat tours provide a serene and magical atmosphere as you admire the illuminated ceiling above.