If you find yourself with some free time in Frankfurt, I recommend hunting down one of their paternosters, a kind of continuously moving step-on-step-off elevator.  They are a fine cheap amusement!

This time, I snuck in to the library at the University of Frankfurt to visit their two paternosters.  These seem to be much beloved by the students.  There are a lot of warnings, including that that you shouldn’t ride over the top, which I’m sure all the students take very seriously.  🙂

P.S. If you do visit, please be discreet.  The library staff quietly tolerate the occasional joy rider, but they would probably have to close off access if there were too many.

P.P.S. Riding over the top is (sadly) less exciting than it first sounds.  The paternoster consists of little cabins hanging from a chain and it is designed so that the cabins stay vertical while going over the top or around the bottom.  Not that I’d know, of course.