Communications training, excursions and practicing skills important for studying mechanical engineering - such as creating Power Point presentations - are once more part of the course "Technical German for international students". For their first class, numerous CDTF students as well as some other course participants from other countries took a trip to downtown Paderborn. Here, they learned many interesting things about the history of Paderborn such as the background of the Libori Festival or the founding of the first university in Paderborn by the prince-bishop 400 years ago. The tour mainly focused on the water of the river Pader. Remainders of the Paderborn waterworks, a structure from the 16th century, can still be seen today - e.g. the Liborius basin on the Kamp as well as the fountain in front of city hall. The city erected these watering places in the 16th century after a number of disastrous fires to have immediate access to water, especially for firefighting. In the source region of the Pader, a recently set-up model of the waterworks helped the mechanical engineering students understand how a piston pump, driven by a water wheel, pumped water to the Liborius basin, the highest point of the waterworks, via a pipesystem constructed of hollowed tree trunks. From here, water was distributed to the basins at lower elevations. Incidentally, a fountain is driven by this model.