Bastion Żubr, Gdańsk

Bastion Żubr is a grass-covered earthen fortification beside the Opływ Motławy, the surviving watercourse of Gdańsk’s former moat. Engineer Cornelius van den Bosch designed it, and construction ended in 1623. It formed part of a defensive circuit built between 1622 and 1636, of which only five examples remain.

The mound conceals a vaulted passage known as a postern, running through the fort. During the Napoleonic wars, the bastion was reduced in height and converted into a gunpowder store. Its passage later took on a civilian role: during the Second World War, it served as an air-raid shelter.

The grassy earthwork has also become a performance space; by 2015, audiences watched street-theatre festival shows from its slopes. The fort’s hidden tunnel and changing uses make this quiet park mound unusually vivid.