This specific spot in the Waitomo Caves is known as the Glowworm Grotto, a place where glowworms create a starry effect on the ceilings. This species is exclusively found in New Zealand and is around the size of a mosquito.
# 17 of 83 - Fingal's Cave, Scotland. This Scottish sea cave is made up of hexagonally jointed basalt columns created by intense volcanic activity. It's Gaelic name means "the melodious cave" due to its haunting cathedral-like atmosphere.