Sub-calculation for the master application of the city of Chemnitz SAB-ProjeklNr 100242718 ESF-funded area city centre. Follow-up application for project No 100309003. The detailed project description is attached to the application of the City of Chemnitz. The scientific visitor excavation “The Window into Earth History” authentically conveys the development of Chemnitz’s earth history. The focus of cultural education is on the fossilised forest Chemnitz. The participants from the assisted area will learn backgrounds about the origin of the fossilised forest in an open commuting and walking structure, learn geological ways of working and gain insight into technical fields of work. In target group-oriented events, participants test each other in their practical work. In the latter part, fossils are recovered in a predefined area of practice and documented in age-appropriate work equipment. Following this phase, the results will be presented within the group and the working methods will be reflected. The offers give the opportunity to test key competences, practical skills and team work. The fossils in the field of practice and the work with professional tools underline the authenticity of the cultural educational institution. The aim of the project is to place a particular emphasis on the low-threshold address of non-school informal events in educational institutions in the assisted area.