Want to tread where others haven’t, or simply leave behind the stresses of the modern world? These destinations are a good place to start. 1. Son Doong Cave, Vietnam. This is one of the world's largest natural caves. It's estimated that only about 30% of this natural park has been explored. 2. Antarctica's Subglacial Lakes. There are nearly 400 known subglacial lakes in Antarctica. These are lakes found under glaciers that have never been studied. 3. Northern Mountain Forest Complex, Myanmar. This forest extends to around 22,000 km2. The majority of this area remains unexplored, while less than 1.4% of it has been affected by humans. 4. Machapuchare, Nepal. This mountain is located in the Annapurna Himalayas. It is sacred to the local people and therefore no one is allowed to climb to its summit. 5. Tepuis, Venezuela. These imposing rock formations are a must-visit. They are both remote and difficult to climb, making them less explored by humans. 6. Fiordland National Park, New Zealand. The country's largest national park is home to amazing scenery and biodiversity. There are protected areas where people can't go.