The Słupia, the Radunia, and the Wierzyca are rivers whose location and energy of water flow was taken advantage of to build hydroelectric power plants. Many of them are still operating and can be visited. The oldest such power plant in Europe, Struga, or the Radunia’s highest-situated plant in Bielkowo, are only a few of the facilities well worth seeing. The principles of physics, chemistry, and mathematics are contained in machines and post-industrial sites, and presented at thematic exhibitions, such as in the Hewelianum Centre.

Radunia Canal


Ul. Trakt św. Wojciecha

83-000 Pruszcz Gdański

An artificial ditch through Radunia river with dikes, associated buildings and greenery along the entire length of the object - from the lock to the west of Gdansk Pruszcz up to the mouth of the canal to the Old Motlawa river in Gdansk.

The canal was laid out in 1338, and built in the years 1348 to 1356 by the Teutonic Knights. The idea of the implementation of this structure is commonly ascribed to the commander of the Gdansk and subsequently Grand Master of the Teutonic Order Winrich von Kniprode, but the real initiator of the construction was another commander of Gdansk (from the years 1333-1334), Jordan von Vehren. The channel was intended primarily for the supply of fresh drinking water for Gdansk and the local castle of the Teutonic Knights, as well as a drive to Great Mill.