****CLICK HERE for RELATED CONTENT**** United States: The Atlantic Plain - http://www.britannica.com/eb/article-77953/United-States?source=youtube_68565 Atlantic Ocean - http://www.britannica.com/eb/article-9109727/Atlantic-Ocean?source=youtube_68565 Gulf of Mexico - http://www.britannica.com/eb/article-9109733/Gulf-of-Mexico?source=youtube_68565 Hurricane - http://www.britannica.com/eb/article-9106251/tropical-cyclone?source=youtube_68565 Appalachian Mountains - http://www.britannica.com/eb/article-9110718/Appalachian-Mountains?source=youtube_68565 Everglades - http://www.britannica.com/eb/article-9033362/Everglades?source=youtube_68565 Mississippi River - http://www.britannica.com/eb/article-9110729/Mississippi-River?source=youtube_68565 Ohio River - http://www.britannica.com/eb/article-9056860/Ohio-River?source=youtube_68565 Tennessee River - http://www.britannica.com/eb/article-9071696/Tennessee-River?source=youtube_68565 FREE NEWSLETTERS - http://mailinglist.britannica.com/settings/