With an array of World War II wrecks such as the SS President Coolidge just off the shores, the seas around Vanuatu's islands are a paradise for snorkelers and divers. Each diving site is much different from the other so rest assured, your biggest problem will be choosing where to snorkel. You can of course, ask the Vanuatu resort you are staying in for advice. The wrecked ships house plenty of rare and magical marine species while a range of corals cling on to the bottom of the ocean. To make the experience even more surreal, certain diving sites even have a trail with a post office at the end so you can post a letter! If you are bored of snorkelling in the open sea, try venturing into an underwater cave for a mystic experience.