Breathtaking Segovia—on a ridge in the middle of a gorgeously stark, undulating plain—is defined by its Roman and medieval monuments, its excellent cuisine, its embroideries and textiles, and its sense of well-being. An important military town in Roman times, Segovia was later established by the Moors as a major textile center. Captured by the Christians in 1085, it was enriched by a royal residence, and in 1474 the half-sister of Henry IV, Isabella the Catholic (married to Ferdinand of Aragón), was crowned queen of Castile here. By that time Segovia was a bustling city of about 60,000 (there are 53,000 today), but its importance soon diminished as a result of its taking the (losing) side of the Comuneros in the popular revolt against the emperor Carlos V. Though the construction of a royal palace in nearby La Granja in the 18th century revived the town's fortunes somewhat, it never recovered its former vitality. Early in the 20th century, Segovia's sleepy charm came to be appreciated by artists and writers, among them painter Ignacio Zuloaga and poet Antonio Machado. Today the streets swarm with tourists from Madrid—if you can, visit sometime other than in summer.
If you approach Segovia on N603, the first building you see is the cathedral, which seems to rise directly from the fields. Between you and Segovia lies, in fact, a steep and narrow valley, which shields the old town from view. Only when you descend into the valley do you begin to see the old town's spectacular position, rising on top of a narrow rock ledge shaped like a ship. As soon as you reach the modern outskirts, turn left onto the Paseo E. González and follow the road marked Ruta Panorámica —you'll soon descend on the narrow and winding Cuesta de los Hoyos, which takes you to the bottom of the wooded valley that dips to the south of the old town. Above, you can see the Romanesque church of San Martín to the right, the cathedral in the middle, and on the far left, where the rock ledge tapers, the turrets, spires, and battlements of Segovia's castle, known as the Alcázar.
Tourists on a day trip from Madrid generally hit the triumvirate of basic sights: the aqueduct, Alcázar, and the cathedral.