Tanna Island is in the Tafea district of Vanuatu. Tanna is located southwest of Aniwa. To the south is the island of Aneityum, and to the north is Erromango. It is 40 kilometres (25 miles) long and 19 kilometres (12 miles) wide, with a total area of 550 square kilometres (212 square miles). Its highest point is the 1,084-metre (3,556-foot) summit of Mount Tukosmera in the south of the island.
The south of the island has the most rugged terrain, with the flattest terrain near the center of the island and along parts of the east coast. Tanna is dominated by small villages, but there are some larger communities scattered around the island.
All of Tanna's main attractions are in two specific regions: White Sands and White Grass. White Grass has the most attractions, including Blue Cave and some snorkeling locations. Mount Yasur, however, is in the far east of the island, near White Sands. Just don't get too close to the volcano - it erupts regularly.