Gannaberg, Mountain summit in Rosengarten, Germany.

Gannaberg is a mountain summit in Rosengarten, Lower Saxony, reaching 155 meters in elevation. The terrain features wooded slopes crossed by walking paths that form part of the Harburger hills range.

The summit formed during the Ice Age as part of a push moraine stretching from Vahrendorf to Dibbersen. This remnant of glacial landscape formation shapes the region's topography today.

The name Gannaberg refers to the gentle rise overlooking the surrounding landscape of the Harburger hills. Visitors encounter a space shaped by walking paths and meadows where nature plays a central role in the area's character.

The Kreisstraße 26 crosses the northern flank of the Gannaberg, linking Sieversen and Langenrehm. The two summits lie about 370 metres apart, with the water reservoir on the higher southern one. The Rosengarten telecommunications tower stands roughly 120 metres southwest of the summit, above the 149-metre contour line.

A telecommunications tower stands roughly 120 meters away from the peak. This structure, rising to 161 meters, provides the region with numerous radio and mobile communication services.