Castle Groeneveld is located on the outskirts of Baar, in a natural environment. It was built around 1970 by the wealthy merchant Marcus Mamuchet to enjoy nature. Key themes in Castle Groeneveld are sustainable growth and green innovations. Around these themes exhibitions, events and debates are organised. The estate covers approximately 130 hectares, with streams, ponds, trees and hills. Staatsbosbeheer manages the estate.