The Kastelberg is the fourth highest summit of the Vosges Mountains. It is located on the former border between the French regions of Alsace and Lorraine.
Etymology
View of the Alsacian slopes of the mountain in early June (year:2006), with the last snow of the Vosges mountains ending to melt
A locality of the Kastelberg named Wormsawald-Ammelthal (literally swallow's nest) harbours the most sturdy snowfield of the Vosges, which usually lasts up to July or, remarkably, to August.)