Historical clue formulations

• Durin's burial place in "The Lord of the Rings" — 2026-08-01
• Where Gandalf declares "You shall not pass!" — 2022-08-24
• Balrog's home in "The Lord of the Rings" — 2021-02-28
• Middle-earth area under the Misty Mountains — 2018-08-07
• Elaborate underground complex in "The Lord of the Rings" — 2014-12-27