Cologne Cathedral, a landmark building in Cologne, is a large-scale gothic church. It took more than 600 years to build. From the appearance, it is indeed very historical. It is basically difficult to see the appearance of the whole church nearby. But I can feel the restoration of this church very shockingly, and I can deeply feel this sublime feeling when I walk into the church. The church is free to enter, and it is a must-visit place to Cologne. Pay attention to the opening hours.