Samoa has no shortage of waterfalls, natural-rock swimming holes, and coastal blowholes. To Sua, which means "big hole," is one of the most impressive natural sights on the main island of Upolu. It's a crystal clear, turquoise-blue 30-meter (100-foot) hole, accessed by a very steep wooden ladder, which some people might find vertigo-inducing. The ladder leads down to a small wooden platform from which swimmers jump or dive. Those who don't want to venture into the trench can take photos, as it's a great sight, and nearby are gardens, a blowhole, and a small beach. It's near Lotogaga village on the south coast of the island—a small, faded sign marks the spot (look out for it, as it's not easy to see).
Main South Coast Road, Lotofaga, Samoa