Check-in - The Travel Guide | 28.05.201605/30/2016May 30, 2016Check-in presenter Lukas Stege explores Lake Constance, with the city of Konstanz, Meersburg Castle and the stilt houses in Unteruhldingen, and explores the area on water, land and in the air!https://p.dw.com/p/1IwqnAdvertisement