Куйбышевское водохранилище
Sviyazhsk (; ) is a rural locality (a "selo") in the Republic of Tatarstan, Russia, located at the confluence of the Volga and Sviyaga Rivers. It is often referred to as an island since the construction of the Kuybyshev Reservoir downstream at Tolyatti, in 1955, but it is in fact connected to the mainland by a causeway.