Ruins of Grand Ringelstein Castle

Perched at 644 meters above sea level on the heights of Oberhaslach, about forty kilometers from Strasbourg, the Grand Ringelstein Castle, also called Ringelsbourg, is a classified historic monument. This summit site is crowned by two imposing sandstone rocks that dominate the landscape. A polygonal enclosure surrounds the low buildings built against the rocks, while the upper castle rises on one of them. The low curtain wall, built with regularly layered bossed stones, dates from the early 13th century, as do the upper parts. These include a pentagonal keep facing north and a dwelling spanning the rocks. A natural fissure was adapted into a cistern to meet the castle's water needs.

Owned by the lords of Eguisheim from the mid-12th century, the site later came under the control of the Bishop of Strasbourg. Known for sheltering robber knights, it was ultimately destroyed in 1470 by the Palatine Count, never having been adapted for firearms.

Today, the castle is accessible via a hiking trail. The Molsheim-Mutzig Regional Tourist Office notably offers the "Ruins Circuit" to explore this historically rich site.