We went back to Rurberg to catch the trip boat along the Rursee northwards to Heimbach. Sadly the commentary was only in German so we didn't learn a thing though I did discover that it is 60 metres deep. I will do some more research on the lakes when I get home with good internet signal. We did a round trip which took almost 2 hours.
Our next destination was Vogelsang which has the large watch tower that we can see from our balcony. The complex was built as a Nazi training camp in 1934 though work was suspended in 1940 because of the war. In 1942 it was used as an Adolf Hitler School and was partially destroyed by Allied air raids in1944. The US Army moved in in 1945 followed by the British in 1946 before transferring it to the Belgian Army in 1950. The Belgians moved out in 2005 and handed it back to Germany. Today there is an extensive renovation project going on funded by EU money to make it into an "international place of active remembrance, where in addition to conveying historical facts about the Nazi era, issues, messages and reflections regarding our present social life are addressed. The focus lies on the question: What has Vogelsang (still) got to do with me". Hmm! The best part of the complex is the wonderful view - see last photo.
It was then back to the apartment for an eat up dinner and to watch Gravity which was amazing.