Ringol

Ringol was the name of a great tower.

Ringol was raised by the Valar to house the Southern of the Two Lamps, Ormal. It was placed in the north of Middle-earth, and together with the northern lamp Illuin lit up all of Arda.

Ringol was destroyed by Melkor, and collapsed. This ruined a great part of Middle-earth, and waters (probably from the eastern ocean) flowed in. Later here was formed the inland Sea of Ringol.