Waitomo Caves, New Zealand
Travel to New Zealand for a different kind of light show, one that’s not in the sky. Even though these caves belong on an alien planet, we’re happy that they’re here on Earth. This is where you find the best glowworm sights in the world, which you can explore by kayak or boat. It’s come straight out of a sci-fi movie. All it’s missing are the aliens, though the glowworms seem to do the trick. Local guide Logan Doull said, “The local Māori people knew these caves existed but were wary of them because they were considered to be portals to the underworld. It was better to keep away than go beyond the reach of daylight and meddle with the spirits.” It seems like there’s no better way to describe them than as gateways to the underworld (National Geographic).