The paper presents different forms of documentation of a Late Antique and Early Byzantine water-powered workshop and milling complex in what is commonly known as Terrace House 2 in Ephesos, Turkey. The entire complex was documented by means of 3D laser scanning in 2009 and 2010. Geometrical data were processed and used in the form of a point cloud in the archaeological analysis. Narrow parts, complex structures, and small rooms of the well-preserved feature were surveyed efficiently using a 3D laser scanner. Additionally, panoramic images were captured. They offered the possibility to colour the point cloud, thus helping to identify and understand the feature better in the model. The developed consistent 3D point cloud of the entire feature provided the spatial data for analyses, reconstructions and technical drawings, such as ground plots and sectional views for publications. In order to address specific questions, e.g. to determine the course of the chute, or the size and position of the waterwheels, it was essential to be able to work with complete geometric data. For that purpose the data were exported from original files, using a free software plugin, and made usable in an internet browser. The interface is easy to operate and allows measurement and marking of 3D distances and coordinates of single points, within one scanner position. These can be saved and exchanged. In addition, using this technique a selection of the 3D data will be made available to the general user.