Curonian Coast
The Curonian coast is defined by a thin, curved barrier between the open Baltic and the sheltered lagoon behind it. The sand spit runs for about 98 kilometres from the Sambia Peninsula toward the narrow strait opposite Klaipėda. A glacial moraine supplies its geological foundation, while wind and sea currents build and move the sand above sea level. The result is a navigable edge to the Baltic and a calmer inner shore shaped by deposition.
Because the barrier is narrow, coast and inland water remain close throughout the journey. Width varies from only 400 metres in its Russian section to about 3,800 metres in Lithuania, near Nida. This fragile balance of sand, wind, and current makes the shore a changing geographic feature: sediment may widen one stretch while erosion and blown dunes alter another.
The spit has long directed both trade and movement. Between roughly 800 and 1016, Kaup was a major pagan trading centre on the coast. Teutonic castles followed at Memel, Neuhausen, and Rossitten in the thirteenth and fourteenth centuries. Later damage came from grazing, timber cutting, and the gathering of wood for military boatbuilding. Stripped of vegetation, dunes advanced and buried whole villages. Prussian authorities began a large revegetation and reforestation campaign in 1825, creating the wooded surface that then helps hold the sand in place. The coast was long a corridor for people, boats, birds, and the shifting materials of the shore.