This project was an youth exchange, in which participate youth organizations from Germany, Croatia with the main organizer from Czech Republic. From each country came a group of young people from the age of 15 years with one youth leader. Total number of participants was 23. The action took place at the castle Helfenburk near Úštěk with permission of ots owner and in cooperation with its administrators. In the summer of 2014 passed off a test stay of Czech and German youth group focused primarily on maintenance work at the castle, for all involved it was positive experience. Nevertheless, we wanted to upgrade the stay by involving the elements of personal development, workshops focused on comfortable survival in nature - the idea came from German partners during the pilot stay. In this project, we provided a space for young people to compare the pros and cons of living in today's civilized society with the age long time ago ("Middle Ages"), realize the importance of nature and life in accordance with it. Young people, of course, contributed by themselves to the maintenance work at the castle Helfenburk. Simple job tasks were drawn up by experts from the civic association Hrádek which ensures its long-term maintenance. A typical day consisted from the morning young peoples mintenance work at the castle and in the afternoons there were activities in which young people entered according to their interest in it. It were workshops of thematic various kinds, short trips, games, etc.. Everything was be framed by joint activities, from energizeers to games on developing cooperation. The main objectives of the project included: - Young people will compare by their own experience the positives and negatives of living in a civilized society and in primitive conditions. - Young people will be involved in the maintenance of the Helfenburk. They will learn how to safely do the maintenance work on the castle. - Young people are practically learn to use renewable energy sources. - Young people will try to plan their own time and schedule activities. After the end of the exchange the Helfenburk castle and neighbourhood was thanks to the intervention of youth in better condition, and during the process of maintaining the castle, participants have learnt how to correctly use simple tools and plan things well and cooperate. Young people through their own experience have now a better idea about the positive and negative aspects of life in the civilized world and outside it, they have tried some of typical works and they know now some ways of using renewable sources. Participants were the co-creators of their program. The greatest impact the project had on the participants themselves, their approach to the world and to him/herselves. Own experience, participants pass on in their countries and organizations. For the Castle itself was benefit, that young people helped to maintenance it.