11 Carbon-Neutral Cities in Europe Leading the Charge in Green Tourism

8. Freiburg, Germany — Solar roofs and transit-first urban planning

Freiburg has a strong reputation in Germany for urban sustainability, with notable emphasis on solar energy, energy-efficient building standards, and a transit-oriented city plan. The regional rail network and local trams connect the city to the Black Forest, which invites low-impact hiking and nature tours. Visitors can choose from eco-friendly pensions and hotels that highlight renewable energy use and regional menus; several lodging options work with sustainability-focused certification schemes. Bookable experiences include guided low-impact hikes in the Black Forest, sustainable wine and food tastings from local producers, and solar-focused educational visits that explain the city’s renewable energy systems. Freiburg’s model shows how renewable energy investments and pedestrian-friendly design can create an attractive, low-carbon visitor experience. For precise program details, check municipal sustainability pages "As of Nov 2025."