Baden-Württemberg is home to Heidelberg Castle, probably the most famous ruin in the world. The Ländle is also home to the largest ruin in Germany, in the Swabian Alb.
In 1875, a chocolate manufacturer had a country villa built in what is now Stuttgart. Around the same time that Gottlieb Daimler and Wilhelm Maybach patented the world's first high-speed gasoline engine, the first chocolate factories appeared in the city. There are not much left of the building today, but it is a reminder of a once-thriving industry.