Glimmersea

Some 20 miles beneath the floor of the Sea of Fallen Stars lies another large body of water, the vast underground ocean known as the Glimmersea, sometimes called the Sea of the Starry Night. It stretches out underneath most of the Sea of Fallen Stars with exception of the Eastern Reach and including the adjoining lands of Altumbel and Aglarond.

The Glimmersea consists of a large body of water filling immense vaults. This waterway is noted for a number of spectacular ribbon-cascades that extend down into it from the cavern ceilings, thousands of feet overhead.

Its name 'Sea of the Starry Night' is derived from the lumniscent rocks found in some of the vaults of the Glimmersea that remind sailors on the underground oceans of the starry night sky of the world above.

Several powerful Aboleth cities lurk within the depths of the Glimmersea and in the shallows stand several kuo-toa and sahuagin outposts. Needless to say these feared races keep adventurers at bay and the seemingly tranquil and smooth surface of the Glimmersea is seldom traversed by the ill-prepared.