Das Fest is the biggest free open-air festival in Karlsruhe, taking place every year in July. It features live music from local and international artists, as well as a variety of food and drink options. The festival has been running for over 30 years and attracts thousands of visitors each year. One of the notable features of Das Fest is its family-friendly atmosphere, with activities and entertainment for all ages. This makes it a great choice for budget-conscious travellers looking for a fun and affordable way to spend their summer.