Te Ana-au Cave, on the western shore of Lake Te Anau, has been developed into a tourist attraction. In 1954 these visitors were making their way to a boat which would take them to the glow-worm grotto. The cave system includes an upstream section called Aurora Cave. This is separated by a sump from Te Ana-au Cave, a shorter downstream resurgence section. The system was formed by the Tunnel Burn, a stream that drains from Lake Orbell in the Takahē Valley.
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