What happened in the '60s and '70s that caused the water quality of Lake Balaton to deteriorate so much that fish and reeds died out massively? How has the lake been restored and how has the condition of Lake Balaton changed in recent years? What is the impact of climate change and what about the residues of medicines and sun cream in the water? And anyway, how much longer can Lake Balaton tolerate humans? The Balaton Limnological Research Institute invites the winning bidder and their party (max 10 people) to an exclusive guided tour to its historic buildings in Tihany, the mesocosm system and the beautiful park, where you can learn all about the past, present and future of Lake Balaton's ecosystem.