Margherita Hut

The Margherita Hut is a mountain hut belonging to the Italian Alpine Club, located on the summit of Punta Gnifetti of Monte Rosa, a mountain massif of the Alps lying near the border between Italy and Switzerland. At 4,554 metres above sea level, it is the highest building in Europe. It was originally opened in 1893 as a research station for high altitude medicine which it still is, but also serves as a simply equipped mountain hut for alpinists.

Source: Wikipedia