Seobuk Gongsindon is a watchtower beside Hwaseomun Gate at Hwaseong Fortress in Suwon. It is a gongsindon, a bastion with a hollow interior, used to fire cannons while watching and attacking the surroundings. It was designated Treasure No. 1710 in 2011, and its first and second floors each have six gun ports on the outer walls. Because it stands next to Hwaseomun Gate, it is viewed together with the fortress wall section rather than as a standalone site.