Replying to
@micron@mastodon.social @mwichary@mastodon.online @yvg@indieweb.social Also really nice if you‘re into industrial culture and architecture: Zeche Zollern in Dortmund. A showcase coalmine site with a beautiful machine hall in Jugendstil (art nouveau).
Also the Eisenbahnmuseum (train museum) in Bochum is worth a visit.