The Cologne Cathedral in Germany is a magnificent tourist attraction and a UNESCO World Heritage Site. It is considered to be the grandest achievement of Medieval architecture and one of the finest examples of Gothic architecture in Europe. Visitors to the Cologne Cathedral can explore its many features, including its two 60-meter-high gothic towers, the medieval stained-glass windows, the Shrine of the Three Kings, the Reliquary of Charlemagne, and many other works of art, sculptures, and paintings. The Cathedral is also a popular destination for visitors for its many religious events, such as Christmas services, Easter masses, and concerts.