DUNKIN' DONUTS. When it comes to donuts and coffee at Hamburg's Dammtor station, our quality can't be beaten. That's because we've been in business since 1950 and have been constantly improving. Back then, Bill Rosenberg opened our first store in Quincy, Massachusetts, USA. Today, we are proud to be the largest chain for baked goods and coffee with over 11,000 stores worldwide, making more than five million customers around the globe happy every day. In addition to specialty coffees, we offer over 30 varieties of donuts, muffins, brownies and cookies, as well as savory bagels, sandwiches, soft drinks and much more.