Until 1948 Te Anau cave that gave the lake its name was
found by Lawson Burrows. Glow worm colonies lighten the walls of the
underground system. However to reach the location you will need a
tour guide. Due to fragile ecosystem inside the cave number of
tourists are controlled. The cave system is also famous for
underground whirlpools and waterfalls that still carve the system
and enlarge it.