Xi'an, China
Fabled Xi'an, formerly the capital of several Chinese Dynasties up to the 10th century and as the terminus of the famed Silk Road, is now a very modern city. The city walls are still intact, but, like most modern walled cities, only encloses a part of the city. You can actually go up on top of the walls, rent out a bicycle and circumnavigate the city, which I did one evening and had a great time!
Due to the it's Silk Road past, Xi'an has a thriving Muslim po...