Study programme 'Water wizard's expedition at the source of clean water' by the Clean Water Theme Park is an authentic and interesting service, which introduces Estonia and the bowels of the earth. Its keywords are environmental sensitivity and authentic natural and cultural experiences. The characteristics of the Pandivere Upland and the nitrate-sensitive area of Pandivere-Adavere-Põltsamaa is used to show how karst is formed and explain the phenomenon of karst. Additionally, different sinkholes are visited, as well as the mystical Varangu blue springs, which are talked about in relation to the local culture. Participants will learn about the large and small hydrologic cycle in the wild.