Rivendell

Rivendell, Karningul, or Imladris, is the home of Elrond and is located on Middle-Earth in the Lord of the Rings continuum. It is one of the regions of Arda most badly warped by Mary Sues.

Its name is commonly misspelled as "Rivendale" in various fanfics by people who have only seen the Movies. (Or worse, Riverdale, by Archie comics fans.)