In Dayal Bagh, 10 km north of Agra. The white marble samadhi of the Radah Soami religion is currently under construction. It was started in 1904 and is nor expected to be completed until sometime next century. You can see pietra dura inlaid marblework actulally being worked on. Dayal Bagh is 2km north of Agra and can be reached by bus or cycle.