📜 The world's only fully functional underwater post office, located off Hideaway Island in Mele, Vanuatu. 🔍 Operational since 2003, it sits at approximately three meters depth in a marine sanctuary. # Why Go 🌊 Unique adventure for divers and snorkelers. ✉️ Experience mailing a waterproof postcard from under the sea with embossed cancellation. 🐠 Explore vibrant coral reefs and diverse marine life while snorkeling or diving in a marine sanctuary. 🏝️ Part of Hideaway Island resort, specializing in scuba and snorkeling. # Why Avoid ⚠️ Opening hours are limited and signaled by a flag, so it might be closed. ✉️ Special waterproof postcards and stamps must be purchased on land. 🚫 Traditional ink will be ruined by water. # Tips 🚩 Check the flag above the float for open hours, which are also posted on the beach. 🤿 Hideaway Island staff can assist snorkelers who can't duck-dive. 📦 Out of hours, postcards can be left in an underwater post box or taken to the main post office. 📍 Located approximately 50 meters from shore.