Sasso da Pigna, Artillery fortress in Gotthard Pass, Ticino, Switzerland.

Sasso da Pigna is a military fortress embedded deep within the Gotthard Pass mountain, featuring extensive underground tunnel networks and operational chambers. The complex preserves historical defense structures and equipment spanning different periods.

The fortress was built starting in 1943 as a defensive response to military threats from neighboring Italy during World War II. Its construction reflected the strategic importance of the Gotthard Pass corridor during wartime.

The museum's name comes from the rock terrace Sasso di San Gottardo. Its "Mythos Gotthard" room traces the pass's story from its naming through Goethe's travels to General Guisan's Reduit, whose core was this fortress. The "Wunderkammer" shows quartz-crystal jewellery still made in Swiss mountain cantons, made with the Urner strahler Elio Müller and the label ELVETIA.

Access to the fortress is available through guided tours that lead visitors through underground chambers and historical defense installations. Summer months offer the best visiting conditions as snow and weather pose fewer obstacles.

Inside the fortress sits the Reduit Image Machine by Tullio Zanovello, a distinctive device displaying animated paintings that tell stories from Gotthard mythology. This unusual art installation creates a rare fusion between military architecture and artistic expression.