Sarisarinama Tepui's & The Mariana Trench. Now I know that the majority of the earth’s continental surface has been explored and documented, but there are still sections that are either too treacherous to explore or just straight up inaccessible and don’t even get me started on the vast majority of our oceans that we know little to nothing about. These are the places that we are going to speak about today. The uncharted, unexplored or un-mapped regions of our world.