Altenberg, Mountain summit in Landkreis Schwäbisch Hall, Germany.

Altenberg is the highest summit of the Limpurg Hills, reaching 564.7 m above sea level and rising about 60 m above its immediate surroundings. It lies east of Hohenberg in the municipality of Sulzbach-Laufen, county of Schwäbisch Hall. On the summit stands the Altenberg Tower, a 38.3-metre wooden observation tower opened on 7 October 2007, designed by Andreas Moll, with a covered platform about 35 m above ground and 201 steel steps.

The area was known as Limpurg territory since medieval times and served as a landmark for local communities. The mountain formed a natural boundary and held importance in regional mapping for centuries.

The tower's design is by Andreas Moll, and its steel steps and beams carry the names of donors who helped fund the construction. At the foot of the stairs a collection box asks for a small contribution toward upkeep, and benches, information boards on the tower's history and construction, and a children's playground stand by the summit.

The route from Sulzbach-Laufen village is clearly marked with signposts leading up on established paths, with information boards at starting points. Parking is available nearby, and the walk is manageable for casual visitors.

The tower was designed by Andreas Moll and assembled from prefabricated glued-laminated timber sections; its 201 steel steps carry the names of donors who helped finance the construction. The open timber frame leaves the interior exposed to weather, and snow often collects on the small pointed roofs inside.