The Seven Towers refers to the seven towers on the walls of the capital of Malkier, a Borderland nation lost to The Blight. The Seven Towers were located alongside some lakes near the Mountains of Dhoom. Today it's only a broken ruin.
According to The Wheel of Time Companion the Seven Towers were defining landmarks of Malkier and were broken by the Shadowspawn armies.
- The Wheel of Time Companion, Seven Towers