#11: Freiburg, Germany
After citizens protested a proposed nuclear plant nearby in the 1970s, Freiburg decided to become a global leader in green planning. They designed districts like Vauban, where homes generate their own solar power and car ownership remains strictly optional. Kids safely play along tiny water channels called Bächle that crisscross the historic center. Residents deeply treasure this thoughtful layout because it cuts utility bills and keeps neighborhood streets peaceful.
