Green Velo

The idea of connecting Masurian Lakes with the Königsberg port was first introduced in the 18th century, however neither of proposed plans was implemented. The construction of a channel on Mamry Lake began in 1911, and after 31 years it was suspended, never to be concluded.

The channel starts in Przystań. Its overall length is 50.4 kilometres (from Przystań to Alleburg/Druzhba in Kaliningrad Oblast), 20.5 kilometres of which are located in Poland. Ten water locks were planned on the channel. Two unfinished water locks in Leśniewo impress visitors to this day; the upper water lock is 46 metres long, 7.5 metres wide and can increase water level by 17 metres, and the unfinished lower water lock was supposed to have similar properties. Several hundred meters from the dike ending the upper part of the channel constructed in a bank there is an interesting roller dam, protecting the valley from flooding in case of a breakdown. On the Polish side, one of the five water locks (Piaski/Guja) on Rydzówka Lake channel is functional and complete. Near the mouth of the channel, the visitors can see unfinished large docks. A rope park located nearby is an additional attraction.