The cellars under Bayreuth's Aktien Brewery are a reminder that beer here was once as much about geology as recipes. Brewers cut tunnels into the sandstone to keep beer cool before mechanical refrigeration, creating a shadow city of vaulted storage spaces below the streets.
Guided tours usually mix brewing history with a bit of wartime and local history, since the tunnels had more than one use over the centuries. It is a good fit for travellers who have already done Bayreuth's opera and palace sights and want something earthier, colder, and very Franconian.