The current shelter, bearing the same name, was built in 1981. At 1,808 metres (5,932 ft) in altitude, it is the site of the former pasture Anterne more commonly called "Cottages Anterne". It is surrounded by five private cottages.
Arriving at Sixt-Fer-à-Cheval in 1850, Wills fell in love with the area and wanted to build a chalet. In 1859 construction began of what he named "Eagle's Nest", what the inhabitants later called "the Castle". During World War II, when France was under Nazi occupation, it was uninhabited and looted. After the war, repair costs proved to be too high, so the family put it up for sale.
References
Wills Alfred, Le Nid d'Aigle et l'ascension de Wetterhorn, Paris, éditeur : C. Meyrueis, 1864. ASIN : B0019S0GL0
Hubert Ducroz, Les débuts de l'alpinisme à Sixt (Haute-Savoie), fascicule édité par l'Association des Amis de la Réserve Naturelle de Sixt Fer-à-Cheval, 1986