The other day we finally went there by car to give a closer look and discovered in fact that the church is locked and is a piece of monumental art, built in what is, in fact, a pile of old rubbish.
It's called the Terp van Ledschenveen and to get there, just drive to the end of Vrouw Avenweg.
http://www.architectuurgids.nl/project/list_projects_of_typeofbuilding/typ_id/27/prj_id/3186
