Scenery, as defined by the Merriam-Webster dictionary, is "a picturesque view or landscape". Scenery is something that is pleasing to the eye that is found in nature. A bubbling brook, a forest along the plains, or the shore of some distant island; all of these are certainly something pleasant to see, but it won't cause the rush that happens when you witness the sublime. All three ingredients have to exist at once. A bubbling brook is comprehendable, and while the forest or shore of an island can be amazingly vast the potential danger is too small to be sublime.
Now I have lived in Kansas my whole life, and for those who aren't familiar with the states, Kansas is nothing but a whole bunch of flat prairies and small hills. The tallest "mountain" in all of Kansas is Mt. Sunflower, about half a mile from the Colorado border. While the prairies are vast oceans of grass and are quite pleasurable to view, I never got the feeling, the experience, of the sublime, and that is most likely due to the complete lack of danger. But one thing that has always gripped me in sublimity are Kansas storms. The massive power and vastness of these storms are nigh impossible to find in other states much less other countries, and the amount of sublimity vs terror that is felt can change by the minute. This constant change is what makes this particular source of the sublime so dear to my heart. Below is some footage taken in Kansas City which captures the ideas of sublimity the best that film can, as you watch the buildings which look small be washed over with the vastness of the storm. This storm did produce some tornadoes, but none were captured in this footage. To be on top of one of these buildings at a time like this is an unforgetable experience.
Now there always must be an element of terror when it comes to viewing these amazing aspects of nature, but the amount of terror should be less than the amount of awe or beauty that it has. Here below is an example of when the potential danger is so great that the sublime experience turns into a terrifying, if not horrifying, experience. I have seen this video multiple times of Geoff Mackley descending into the volcano and watching it erupt beneath him, and I do believe, that he experiences a rush akin to the sublime, perhaps with a bit of adrenaline. This is the raw footage taken from the site and there is some rough language, so please view at your own discretion.