The Charleston Glowworm Cave Tour by Underworld Adventures takes visitors deep into the pristine Metro/Te Ananui cave system in New Zealand’s Paparoa National Park for an unforgettable underground experience. After a scenic rainforest train ride and short walk, guests explore spectacular limestone chambers filled with ancient stalactites, stalagmites, and dramatic rock formations before reaching one of the world's most impressive displays of native New Zealand glowworms (Arachnocampa luminosa). Led by knowledgeable guides, the tour combines natural history, geology, and conservation with an authentic caving experience that remains largely untouched by modern infrastructure. Suitable for ages five and up with moderate fitness, the 3.5-hour adventure offers a unique opportunity to experience the beauty and biodiversity of one of New Zealand’s most remarkable cave systems.