I've done this before. When I left Harvard to take a year off, I traveled to The South Island of New Zealand. As I recall, I stayed in a hostel near Queenstown and traveled on a boat on a lake to see glow worms in a cave. The lights were turned off, and the cave was entirely dark and 100% lit by glow worms. It was beautiful! Amazing! Unforgettable! I still remember, as well, one of the Japanese tourists - an older male - who was there with me. I think he had either a camera or a video camera. Christa Bergman Brown