20 Breathtaking Wonders Of The World You Have To See

Cologne Cathedral, Cologne, Germany

Cologne’s magnificent twin-spired cathedral, known as the Kölner Dom, is Germany’s largest Gothic church. Once the world’s tallest building, it took more than seven centuries to construct this ecclesiastical masterpiece. Work on the cathedral began in 1248 and was not completed until 1880, but it was worth the wait.