This remote volcanic island, part of a chain of islands of the same name, is considered the world's most remote inhabited place in the world. A former British outpost, it doesn't have an airport, meaning if you want to visit you have to arrive by boat.
Expedition cruises and three scheduled ships from Cape Town, South Africa, visit annually to bring cargo and passengers to Gough Island. From there, it's another boat ride to Tristan, where rugged nature (brave souls can attempt to hike a volcanic peak) and a single pub, open a few hours a day, await.
This is the place to go if you truly want to get away from it all. There isn't even any Wi-Fi!