Hohenzollern Castle is the ancestral seat of the imperial House of Hohenzollern. The third of three castles on the site, it is located atop Berg Hohenzollern, a 234-metre bluff rising above the towns of Hechingen and Bisingen in the foothills of the Swabian Alps of central Baden-Württemberg, Germany. A popular tourist destination, Hohenzollern castle has over 300,000 visitors per year, making it one of the most visited castles in Germany.