1) Fictional valley 
Rivendell is an Elven outpost in Middle-earth, a fictional realm created by J. R. R. Tolkien. It is an important location in Tolkien legendarium, and is featured in The Hobbit, The Lord of the Rings, The Silmarillion, and Unfinished Tales. It was established and ruled by Elrond Half-elven in the Second Age of Middle-earth (four or five thousand ye...