The Hageland hills originated during the tertiary geological period from 65 million to 5 million years ago. Then the sea flooded many parts of our country several times before retreating. Time and again this resulted in deposits of thick packs of sand and clay, also known as the Diest formation. Some sandbanks are 55 meters high. The name of the Dassenaarde nature reserve recalls the badgers that used to have their castles there until the late 1950s. The badgers does not appear here any more. From the Bolhuis chapel you look out on the beautiful valley in which the Kleine and de Grote brook merge into the Zwarte brook. The Bollhuis chapel, also known as the white chapel, is the oldest chapel in Molenstede and dates from 1775. The old farmhouse "Bolhuis" is a typical Kempian long gable farm that consisted entirely of loam until the end of the nineteenth century. At the moment stone has been built around it and you can only see some remnants of the mud walls inside the farm. The walls of this farm are on foundations of the local iron sandstones. This nature farm plays an important role in the management of the surrounding nature reserve Dassenaarde. The animals that are used in nature management find shelter here.