Brig is an Alpine town in Valais canton, in southern Switzerland. It sits at the foot of the Simplon Pass, which leads to the Italian border. Brig is a stop on the Glacier Express railway and is known for its thermal baths, St. Sebastian Chapel and 17th-century Stockalper Castle. The castle was built by the merchant who developed the pass into a trade route. The Aletsch Glacier and Simplon ski regions are nearby.