The Lorelei is still A fairly sharp narrow bend on the Rhein, but has been thoroughly dredged so isn't the navigational hazzard thet it was when the legend arose, or when Heine wrote his song. If you take a boat trip through the Lorelei nowadays, the boat will almost always play the song as it rounds the rock.

There's also a 26 verse poem "Die Lore Lay" by Clemens Bretano that I've been thinking of translating for over 20 years (so don't hold your breath. It starts "Zu Bacharach am Rheine wohnt' eine Zauberin" (At Bacharach on the Rhine there lived a sorceress).