Bathing in river Jizera
River Jizera is one of the most clean rivers in the Czech republic but also one of the coldest. It springs in the Jizerské hory and its not possible for the sun to heat it even a little bit. Bathing in it is refreshing and highly recommended in summer.
Žlutá plovárna area offers nature bathing with great access to the river itself. Bathing is safe even for kids, because up the weir is not big depth. Grassy banks are great place for sunbathing during the summer days.