"The Writhing Wall is a magical barrier made of souls, splitting Solstice in half. It separates the island of Solstice into two distinct regions: Western Solstice and Eastern Solstice, and blocked all travel between the two areas. The barrier is bright blue in color, and is visible from a fair distance away. It also produces a low droning sound that can be heard when approaching the Wall. When examining the streams of energy joining with the Wall, you may see the faces of tortured spirits being dragged into the barrier." - UESP Wiki