Hanging Glacier of Alisedran
In the depths of the Corusk Mountains (probably Hex J-16) is a glacier considered to be a holy site by the clergy of Telchur. It has been infused with magical wards intended to prevent the goddess Loviatar from entering the world of Oerth.
Sources
From the Ashes, Atlas of the Flanaess, page 67 Dragon magazine #265 - "The Oeridian Lesser Gods"