Zvenigorod, Zhukovsky, Bronnitsy, Voskresensk, and — at the confluence of the Moskva and Oka — Kolomna. As of 2007, there are 49 bridges across the Moskva River and its canals within Moscow city limits; the first stone bridge, Bolshoy Kamenny Bridge, was erected in 1692. Within the city, the river is wide, the narrowest point being under the Kremlin walls. Drinking water for the city of Moscow is collected from five stations on the Moskva River and from the Upper Volga reservoirs (north and north-west of the city). Islands Canals, built within Moscow city limits, have created a number of islands. Some of them have names in Russian, some have none. Major, permanent islands (west to east) are: Serebryany Bor. Separated from the mainland in the 1930s. Tatarskaya Poyma, commonly known as Mnyovniki. Separated from the mainland in the 1930s Balchug Island, also known as Bolotny Ostrov, lying just opposite the Kremlin. The island was formed by the construction of the Vodootvodny Canal in the 1780s, and has no official name in Russian. Moscow residents informally call it "Bolotny Ostrov" (Bog Island) while members of Moscow's English-speaking community refer to it as Balchug. One uninhabited island north of Nagatino. Three uninhabited islands east of Nagatino, connected by the Pererva dam and lock system. Recreation There is a fleet of river ice-breaker cruisers which ply routes from moorings at the Hotel Ukraine and Gorky Park to the Novospassky Monastery and back. Duration of trips ranges from 1.5 to 3 hours. References External links Rivers of Moscow Oblast Rivers of Smolensk Oblast Rivers of Moscow