If you’re lucky enough to be in Germany, then there are many dive sites that should definitely be on your radar. From century old quarries and sunken cities to WWII wrecks, Germany’s diving is not to be underestimated. The sunken ‘city’ of Nordhuisia, modeled after the free imperial city Nordhausen, has been specially built as a dive site to not only attract divers, but also fish, crabs and sponges. Using environmentally friendly materials it has piece-by-piece been painstakingly lowered into the lake. In terms of volume, Lake Constance is the second largest freshwater lake in Central and Western Europe. There are around 45 species of fish including eels, catfish and trout as well as a few wrecks, including the famous paddle steamer Jura, which lies at a depth of 39 meters/127 feet.