Cologne Cathedral, Germany
Did you ever want to see the largest Medieval church in existence? Well, here it is. The construction of this astounding building started in 1248, and it took 500 years to complete. Beautiful in and out, full of history and meaning, this is a must-see destination in Europe. In fact, it is so popular among the tourists that it is the number 1 attraction in Germany with around 20,000 people visiting it every day.
