Welcome to Burghausen Castle, a monumental achievement in medieval engineering that stands proudly on a narrow ridge high above the Salzach river. You are currently standing at a site that holds a prestigious title: according to the Guinness World Records, this is officially the longest castle complex in the world. It stretches for an incredible one thousand and fifty-one meters—that is well over a kilometer of fortified history for you to explore. As you orient yourself, look out over the horizon. On one side, the milky green waters of the Salzach mark the natural border between Germany and Austria. On the other, the emerald Wöhrsee lake sits nestled at the foot of the hill. This unique geography is why the castle was built in its distinctive, elongated shape—it was literally designed to occupy the entire hilltop to leave no room for attackers to gain a foothold. Take a deep breath of the Bavarian air and prepare yourself for a walk through a thousand years of history.