Contributor Abovetheclouds managed to capture Switzerland''s most famous castle ruins and one of its most famous churches in a single video. Valère Basilica (sometimes called Valère Castle) is a fortified church near the town of Sion in the southwestern part of the country. It dates to the 11th century. Tourbillon Castle sits on a hill opposite Valère. Built in the late 13th and early 14th centuries, it's been in ruined state since a fire destroyed it just prior to the Napoleonic Wars and was never rebuilt.