The Finstermünz Fortress was an important crossing over the Inn as part of the Via Claudia Augusta more than 2,000 years ago. The tour of the fortress in the tri-border region Italy-Austria-Switzerland offers an insight into the rich history of this place, where traders and smugglers were confronted by tax collectors back in Roman times. In a spectacular setting, the inside of the fortress boasts secret passageways and amazing rooms.