CultureBonn - Art on the Rhine03:23This browser does not support the video element.Culture09/21/2013September 21, 2013"The Secret Gardens of Rolandswerth" are open until October 20, 2013 - a treasure trove of outdoor artworks that incorporate elements of nature. The gardens belong to the Hans Arp Museum south of Bonn, which also holds workshops for children.Copy linkAdvertisement