The 30 Cleanest Cities in the World

Freiburg, Germany

Home to some 220,000 people, Freiburg is known as Germany’s sunniest and warmest city; however, it is also appreciated for its beautiful parks, clean streets, fresh air, and eco-friendly environment. Situated in the heart of the major Baden wine-growing region, it serves as the primary tourist entry point to the scenic beauty of the Black Forest, a large mountain range.