The city walls of Chester, in Cheshire, England, date back even further than Hadrian's Wall. First built with earth, these walls were eventually reinforced with sandstone by the Romans. When the fortifications required repairs, any available stones were used, including some gravestones, which were excavated in recent times and can now be seen in local museums. Extensions, towers and gates were added over the centuries. The wall now makes an almost complete two-mile circuit around the historic center of the city. Since it was used for defensive purposes throughout its history, the structure has always been well preserved. It is now a major tourist attraction and people can walk along the top of the wall and even visit several sections that date to Roman times.