The Old Observatory is a nice place to visit. Built in 1904, it is the first contemporary observatory in China. However, nowadays the building is home to a Youth Hostel. It has a great view of the old German town from your room and its rooftop café. You can view many landmarks while enjoying a beverage. Mamahuhu café is a friendly rooftop café offering cheap beers and decent dumplings (Jiaozi). The Café is also a great place to relax and talk to friends. Guests are friendly and from all over the world. You can even rent a room if you like, but don’t forget to make a reservation.