Near Jablonec there is a river whose waters you can follow along the Odra-Nisa international cycle path to the Baltic Sea.

But you don't have to go to the sea to make it stick in your memory. The river also appears in the name of the Jablonec folklore ensemble Nisanka, which became the patron of the nearby lookout tower of the same name. And believe that hiking on it will be a true experience for you, as well as the views it will offer you.
House of Jana and Josef V. Scheybal → Church of the Exaltation of St. Crosses → Jablonecke Paseky → Kynast → lookout tower Nisanka → spring of Nisy → lookout Dobrá Voda → House of Jana and Josef V. Scheybal