This world-famous natural wonder, which is situated about 120 miles south of Auckland, features a boat ride through Glowworm Grotto, where thousands of glowworms illuminate the cave ceiling.

U.S. News Insider Tip: Café Olé, just outside the Crystal & Fantasy Caves, has one of the best fish sandwiches on the island. A sun hat is essential because you'll sit in the garden while they ...