Avila is one of Spain’s oldest cities, and surrounded by well-preserved walls dating from the 11th century, it resembles an immense castle. The old quarters are home to a number of important Romanesque churches, Gothic palaces, and the city’s 12th-century Gothic cathedral, which is also fortified. On this full-day excursion from Madrid, you’ll see the exterior of the Avila Cathedral, the Romanesque Basilica of San Vicente, and visit the Plaza Mayor. Take a short walk through the city’s old streets to the Convent of Ste. Therese. Continue on to Segovia, a city rich in historical monuments. See the magnificent Roman Aqueduct from the time of Emperor Augustus. The elegant Cathedral, and its Alcazar fortress, the most spectacular castle in Spain, are among the highlights. Both Avila and Segovia are listed as Heritage of Mankind cities.