Estonia has been crowned the world’s cleanest country, topping the Environmental Performance Index with a score of 75.3. Known for its pristine air, green policies, and medieval capital Tallinn—a UNESCO World Heritage Site—the nation offers travelers eco-friendly adventures at affordable prices. From forest hikes and coastal trails to historic streets and sustainable stays, Estonia blends history, nature, and modern green living, making it Europe’s most enticing eco-travel destination.