Tumladen

Tumladen was the name for the hidden valley within the Encircling Mountains where the Elven city of Gondolin was built during the First Age. Tolkien's The Silmarillion tells how Turgon, a king of the Noldor, discovered Tumladen under the divine guidance of the Vala Ulmo, Lord of Waters.

"...Then Tuor and his companion fared over the plain that was of a marvellous level, broken but here and there by boulders round and smooth which lay amid a sward, or by pools in rocky beds. Many fair pathways lay across that plain..."

― The Fall of Gondolin