Biosphärenhaus, Environmental museum in Fischbach bei Dahn, Germany

Biosphärenhaus is a glass-fronted building on the eastern edge of Fischbach bei Dahn, its roof topped by an angular dark-panel canopy. The facade carries the word "Erlebnisausstellung" and reveals an interior staircase behind green-tinted glazing. Opened in 2000 as an Expo 2000 project, it housed a multimedia exhibition on the Palatinate Forest-North Vosges Biosphere Reserve; it has been closed since 15 October 2023.

The Biosphärenhaus opened in March 2000 as a decentralised project of Expo 2000 in Hanover, initially as a single-storey information centre for the Palatinate Forest-North Vosges Biosphere Reserve. The Wappenschmiede nature experience centre was added in March 2002, followed by a 270-metre treetop walkway in June 2003. After several changes of operator, the house closed on 15 October 2023.

The name Wappenschmiede refers to the coat-of-arms smithy added in March 2002, a hall with kitchen and overnight rooms that school classes use. The Wasser-Erlebnis-Weg, opened 2006 along the Saarbach, presents water at 14 stations: hydropower, water creatures and water quality. The site lies in the cross-border Palatinate Forest-North Vosges Biosphere Reserve, beside the Königsbruch nature reserve.

The whole complex, including the 270 m treetop path and the Wappenschmiede nature experience centre, has been closed since 15 October 2023, so check the current status before travelling. The site lies on the eastern edge of Fischbach bei Dahn, beside the Königsbruch nature reserve and the L 478 road between Bundenthal and Eppenbrunn. The former walkway was only partly barrier-free, and its towers were reached via suspension bridges.

The 35-metre Adlerhorst viewing tower on the treetop path could also be reached over three named suspension bridges: the Hängebrücke, Tellerbrücke and Dschungelbrücke. From its platform, about 25 metres up, mounted binoculars point over the biosphere reserve and the Saarbach valley. The walkway closed with the house in October 2023.