Regarding the junkies, while I knew two decades ago that the Hbf's surroundings are said to be their center, I somehow never met any there (Ditto at Hamburg's Hbf when I was there).

The Bingen-Koblenz section of the Rhine is one of the reasons I'd go back. My favorite spot was Burg Stahleck in Bacharach, good view of the valley (and also the Pfalz in the river).

_{*Lunatic*, n.
One whose delusions are out of fashion.}