Bart, our cruise director warned us that our tour guides, when passing through Frankfurt on our way to Heidelburg, would invite us to admire the Frankfurt skyline. He was right, and here is part.
Overnight we cruised to Rudesheim, a town at the gateway to the Rhine castles.
Our included excursion was to a mechanical music machine museum, possibly (nay, likely to be) the only one in the world.
They were all incredibly expensive and this one, being from a fairground, was very, very, loud. It took four years to restore, and stands about three metres tall.
A gondola links the town to a hilltop monument which is hidden by scaffolding.