Alte Donau is a beautiful, man-made lake located in Vienna.
The lake was created in 1868 as a flood protection measure for the city, and has since become a popular destination for tourists and locals alike. The lake is surrounded by a picturesque park, which is perfect for picnics, walks, and bike rides. The lake is also a popular spot for water sports, such as swimming, sailing, and stand-up paddleboarding. Visitors can also take a boat tour of the lake to take in the stunning views of the city skyline. One of the most famous attractions at Alte Donau is the Strandbad Alte Donau, a popular beach spot in the summer. Visitors can also enjoy the many restaurants and cafes that line the shore. Overall, Alte Donau is a must-see destination for anyone visiting Vienna, offering a peaceful escape from the hustle and bustle of the city while still being within easy reach.