This is a must do for everybody, being a Swiwi (Swedish Kiwi) Waitomo Caves is still on my top list of places in New Zealand.
The area is surrounded by lush forest filled with walking tracks, streams and waterfalls but go underground and a whole new world opens up. The caves were carved by underground streams pushing through the limestone over thousands of years. Many have amazing stalactites growing down from the ceiling and stalagmites growing up from the cave floor, formed over centuries by dripping water. I would describe it as an out of world experience that is only beaten by what awaits you further down.
Climb aboard the boat taking you to the underground Waitomo River. As you glide silently through the starry wonderland of the Glow-worm Grotto, there is a myriad of glow worms that light the way. As you enter this galaxy of tiny living lights, you'll immediately experience a serene ambiance and be fascinated and intrigued by tiny glow-worms that light the cave.