Add admission prices, distances, and Rotterdam as a stop option. Research-verified: Heidelberg Castle €11, Domtoren €13.50, Speyer Technik Museum, Caracalla spa, Rhine Valley day trip, Worms.
Route: Germany → Hoek van Holland ferry → England → Isle of Man → Ireland (Wild Atlantic Way cycling). Includes location files, AI context, contributing guide, and README with ferry/logistics table.
Till Mueller