In the usual manner, an excursion to a current interesting construction project took place at the end of the lecture Foundation Engineering and Soil Mechanics (Bachelor's programme). In the course of the construction of the Koralm Railway from Graz to Klagenfurt, three tunnels (Peratschitzen Green Tunnel, Srejach Tunnel, Untersammelsdorf Tunnel) will be built on the Carinthian side near St. Kanzian with low overlap in extremely difficult subsurface conditions (sea clays). At the invitation of Keller Grundbau, interested students (mostly female!) visited the construction site on June 21, 2016. After a welcome by the ÖBB project manager and an introduction in the info box by the managing director of Keller Grundbau, as well as a lecture on the project and the geotechnical challenges, the construction site was visited, during which the production of large bored piles and the application of the jet jet method could be followed. All work steps were explained in detail by Keller employees and the complex construction site equipment, which is very complex, especially for the jet jet method, was visited. The students were able to "grasp" the sea clay in the truest sense of the word and thus get an impression of the properties of the extremely difficult subsoil. Already on the outward journey (with Admira Wacker's team bus), Professor Adam pointed out numerous geotechnically difficult sections on the south-east bypass and the southern motorway and told one or two anecdotes about them from his professional experience. A big thank you goes to the company Keller Grundbau, with Managing Director DI Andreas Körbler at the head of the top-class team on site, for making the construction site visit possible and carrying out as well as for the catering, which, like the entire excursion, was "at its finest"!