If you want to see a data center from the inside, you should make a note of 7.11.2025. In 2024 there were 26 data centers in 16 German cities, in 2025 also NUE1.
On the Day of Open Data Centers (TdoRZ), operators of data centers of all sizes are inviting visitors from all over Germany: In guided tours, interested parties have the opportunity to find out what goes on in data centers and what central importance they have for modern life.
The campaign was initiated by the German Datacenter Association (GDA), which represents the interests of the data center industry in Germany. The members of the association jointly developed the concept for the campaign, which took place for the first time in 2023 and is unique in Europe on this scale.
All participating data centers: https://tdorz.de/liste/