<|begin_of_text|><|begin_of_text|><|begin_of_text|>Outside of the ocean floor, there are no empty spots on a map of Earth. At one time, of course, that was not the case. As little as a 150 years ago, most of the western United States and Canada's<wm> boreal zone was devoid of human habitation. However, in only two states in the US - California and Oregon - the US Army Engineer corps surveyed and mapped many such "uninhabited" areas. These areas are now only home to a small number of individuals and their families.
As for natural wonders - what are some examples of unusual, isolated locations on Earth that are often thought to be man-made?
Some of the top 10 examples of unusual, isolated locations are:
1- **</wm>Hells Gate**: Also known as the Taba Massif, this massive volcanic field is surrounded by