Hohenzollern Castle
Hohenzollern Castle (German: ) is the ancestral seat of the imperial House of Hohenzollern. The third of three hilltop castles on the site, it is located atop Mount Hohenzollern, above and south of Hechingen, on the edge of the Swabian Jura of central Baden-Württemberg, Germany.
Sigmaringen Castle
Sigmaringen is located on the southern edge of the Swabian Jura, a plateau region in southern Baden-Württemberg. The Hohenzollern castle was built below the narrow Danube river valley in the modern Upper Danube Nature Park (German: "Naturpark Obere Donau"). The castle rises above the Danube on a towering chalk projection that is a spur of the white Jura Mountains formation. The hill is known simply as the "Schlossberg" or Castle Rock. The "Schlossberg" is about long and up to above the river. On this free-standing towering rock, the princely Hohenzollern castle is the largest of the Danube valley castles. The sheer cliffs and steep sides of the tower made it a natural site for a well-protected medieval castle.