The main focus of the “Urban Experimental Lab” aims at the illustration of urban visions. Dealing with the subject city by covering past, present and future aspects will issue the programmatic approach. Equipped therewith the urban space of tomorrow is to be tackled experimentally and the spatial impact of concrete projects can be clearly visualized. The project Urban Experimental Lab represents the continuation of twenty years of experience with digital city models and experimental simulation environments for urban planning, relying on a wealth of experience accumulated in these fields. The paper describes the technical concept of the “Urban Experimental Lab” as well as desired research fields within urban planning, urban reconstruction and urban archeology and potential benefits.