Happy 123rd Birthday J.R.R. Tolkien!
Without you we would not have Hobbits to envy for their peaceful way of life, we would not have the word eucatastrophe, and there would not be a family of sea slugs called Smeagol.
Here is LotrProject's interactive map of Middle-earth, allowing you to explore the wonderful world he created, on the web.
P.S. If you want to know more about those sea slugs: http://lotrproject.com/blog/2014/03/23/9-things-related-to-tolkien-you-maybe-didnt-know/