The Kleiner Feldberg is with an elevation of 826 metres (2,710 ft) the second-highest mountain of the Taunus

Taunus

The Taunus is a low mountain range in Hesse, Germany that composes part of the Rhenish Slate Mountains. It is bounded by the river valleys of Rhine, Main and Lahn. On the opposite side of the Rhine, the mountains are continued by the Hunsrück...

 mountain range in Hesse

Hesse

Hesse or Hessia is both a cultural region of Germany and the name of an individual German state.* The cultural region of Hesse includes both the State of Hesse and the area known as Rhenish Hesse in the neighbouring Rhineland-Palatinate state...

, Germany

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

. The Großer Feldberg

Großer Feldberg

The Großer Feldberg is the highest mountain in the Taunus mountains. It is situated in the Hochtaunuskreis district in Hessen, Germany....

 is located in its immediate neighbourhood.

In 1913, a meteorological and geophysical observatory was built there by German meteorologist Franz Linke. In 1988 an astronomical observatory was built on the mountain's top. The source of the Weil River

Weil River

The Weil is small 50 km long river in Hesse, Germany. It is a left tributary to the Lahn river and the city of Weilburg is located next to its mouth. The river flows exclusively through the Taunus mountain range with its source being located between the Kleiner Feldberg and Großer Feldberg...

 and a small castle of the Limes Germanicus

Limes Germanicus

The Limes Germanicus was a line of frontier fortifications that bounded the ancient Roman provinces of Germania Inferior, Germania Superior and Raetia, dividing the Roman Empire and the unsubdued Germanic tribes from the years 83 to about 260 AD...

are located at its base.