The coastline between Cassomir and the mouth of the River Porthmos is called Jagged Saw. This ragged coastline features rocky cliffs and shallow rock formations. The only natural harbor of the area is at Ridonport though a lot of small boat-safe coves can be found along its length. The winds of the Inner Sea rage in this region like vicious beasts, blowing at 30 to 40 miles per hour. To support the ship traffic, Old Taldor built thousands of towering, magically powered lighthouses along the coast, but only a few remain intact. One of these lighthouses, located at Cassomir harbor, is called the Treacherous Jack.