The ancient town of Segovia, lying on a slope of the Guadarrama Mountains with the confluence of the Eresma and Clamores Rivers below, is a delightful taste of the glorious past of the area known as Castile in central Spain. Segovia is 54 miles (91km) northwest of Madrid and is well worth visiting for its reputation as being the most beautiful city in Spain, awarded a place on the UNESCO World Heritage list. The ancient Romans turned the town into a military base, leaving behind Segovia's famous aqueduct which begins nine miles from the city and until fairly recently still supplied the town with water. The other main attraction in Segovia is the fairytale Alcazar, a fortified citadel perched on the edge of town that the Walt Disney castle is said to be modelled on. The town overflows with Romanesque churches, 15th century palaces, narrow streets and small fountain-splashed plazas and is best explored on foot.