On a train journey along the Rhine Valley from Mainz to Koblenz I took this photo of Burg Pfalzgrafenstein. The building situated on a tiny island served as toll station until 1866. Since 2002 it is part of the UNESCO World Heritage Site Upper Middle Rhine Valley.
Sources / More Info
- Burg Pfalzgrafenstein toll station (Website)
- Burg Pfalzgrafenstein (Wikipedia)