Dietzenbach is a small German town with a population of around 35,000. Locally, it is best known for its open-air forest swimming pool and an architecturally unusual observation tower from which, on a clear day, you can see Frankfurt, some 12 kilometers (7 miles) away. Its location is probably one of the main reasons why the US tech giant Google chose to invest several billion dollars in a new, high-performance data center. The greater Frankfurt area is one of the most important data center