If you like clockwork, and you happen to be in Switzerland, try and visit Lucerne: there's a free clock museum there (in one of the towers of the old city wall)

If you like clockwork, and you happen to be in Switzerland, try and visit Lucerne: there's a free clock museum there (in one of the towers of the old city wall) full of old church clocks --- one dating from 1535. They're all running, although some are electrically wound, and they're all huge and with enough open space inside that you can see how they all work; some of them still ring. Good views over the city, too.