Fleckenstein Castle
Lembach

The Fleckenstein Castle is a 12th-century semi-troglodyte fortified castle, now in ruins, the remains of which stand in the French commune of Lembach, in the Bas-Rhin department, in the Grand Est region.

It extends over a rocky bar 100 metres long at an altitude of 338 metres in the Vosges du Nord Regional Nature Park, making it the second most visited castle in Alsace after Haut-Kœnigsbourg.