This is a summertime oasis for the whole family, with a choice of sailboats, electric boats, and surfboards located on the Alt Danube. Take a trip around the Old Danube or simply go swimming at one of the many swimming areas with lifeguards, restaurants, and swimming pools. Across from the swimming area is a large park area called the Donau Park. In the middle to the park is the Donau Turm, certainly one of the tallest structures in Vienna, at 252 meters, and among the 75 tallest towers in the world. Take an elevator to the top, where you can eat a nice meal or simply enjoy a coffee as you gaze over all of Vienna while the restaurant turns a full 360 degrees.