This One Piece theory suggests Luffy and the Straw Hats have already been to God Valley and neither they nor viewers knew it ...
In the movie The Lord of the Rings: The Fellowship of the Ring, Gandalf the Grey faces off against the Balrog of Morgoth in the Mines of Moria ... A violent battle ensues, reaching the highest ...
The video game The Lord of the Rings: The Battle for Middle-earth even included a level adapting the fight against the Moria Orcs on the edge of Lothlórien, though it took place at night instead ...