Leilon was a small mining town that served as a convenient resting place for travelers on The High Road, especially considering its location sits just outside The Sword Mountains and north of The Mere of Dead Men.
Leilon was abandoned soon after the Spellplague broke the magical wards of the High Tower of Thalivar and released all of its guardians, who then rampaged through the village. Any survivors that did not flee were then subject to the new magical forces from the tower that paralyzed all who looked upon it. Leilon was abandoned at this point and everyone on the High Road took a wide detour around its ruins to avoid the sight of the tower.