 The fort, which was about a kilometer in circumference and was about 12 feet high, was made of heavy red sandstone and had six bastions (the tower of view) and five-meters (seven Kol) wide trenches.An earthen fort along the border of Vadakkumkoor and Thekkumkoor, it beginning from Athirampuzha, it extended to Kondur (east of Palai).Initially, the Thekkumkur boundary was the Western Ghats (Sahyadri Mountains) to the Vembanadu Lake (Vembanadu Kayal) and the Kanakkary to Kaipattoor (Kadavu) in Achankovil River.