Kerzhenets

Kerzhenets
Physical characteristics
Mouth	Volga River
Length	290 km

Kerzhenets River (Russian: Керженец) is a river in the Nizhny Novgorod Oblast in Russia. It is a left tributary of the Volga, joining the Volga near Lyskovo, about 70 km east of Nizhny Novgorod.

There used to be numerous settlements of the Old Believers (called Керженские скиты, or Kerzhenets sketes) along the Kerzhenets River in the 17th-19th centuries. Their inhabitants were known as kerzhaks (Кержаки).

According to an Old Believer legend, the oldest of the sketes, the Olenevsky Skete (Russian: Оленевский скит) (today, the village of Bolshoye Olenevo, some 24 km south-east from Semenov), had supposedly been founded in the 15th century by some of Venerable Macarius's monks to commemorate their leader's Miracle of the Moose that took place at that site, and later joined the Raskol.

References

it's a river. so it has water in it. you can swim in water because water is what you swim in.