edge { arrowstyle: filled; }
graph {
  colorscheme: x11;
  flow: south;
  title: GRAPH_0;
}
group {
  align: center;
  fill: inherit;
}

( cluster0
  [ Wasserkuppe ]
  [ Zugspitze ]
) { align: left; label: Bergtour:; labelpos: bottom; border: dashed  black; }

[ Zugspitze ] --> [ Wasserkuppe ]