10 Lesser Known Natural Wonders
From strange alien landscapes to the Gates of Hell, here are 10 natural wonders you might not have heard of.
Nature, in the broadest sense, is the natural, physical, or material world or universe. Nature can refer to the phenomena of the physical world, and also to life in general. The study of nature is a large part of science. Although humans are part of nature, human activity is often understood as a separate category from other natural phenomena. (source : wikipedia