The rooftop terrace of the Hotel Victoria in Freiburg, in the south-west of Germany, offers glorious views of the mountains that are one source of fame for this pretty city in the Black Forest.
The city’s other claim to fame lies closer to hand: The Victoria’s roof itself is packed with row upon row of solar panels, and a quick glance across the flat, sloping, and crooked rooftops of this old city shows similar arrays. Even the distant football stadium boasts its own solar-energy plant.
