Menegroth
Menegroth, also called the Thousand Caves, is the subterranean fortress and capital of the elven realm of Doriath in Beleriand during the First Age. Its name derives from Sindarin and refers to the vast network of caves and vaulted halls carved from rock beneath the hills that shelter the realm. The city was created at the behest of King Thingol with the labor of Dwarves from Nogrod and Belegost, who cut the labyrinth of chambers, bridges, and passages that formed its core.
The fortress functioned as the residence and seat of government for Thingol and his queen Melian the
Menegroth is notable in legend for the event of Thingol’s death: he was slain in the halls