Trip: Southern Spain + Morocco

Built in a Moorish style in 1366, this synagogue became a church after 1492 but is now being restored to its original form. Hebrew inscriptions adorn the walls of this major Jewish site.

One of the oldest Moorish monuments in Spain, this tiny 10th-century mosque was built over a Visigothic chapel then converted into a church by King Alfonso.

Originally a synagogue and later a church, this 13th-century Mudejar building with white horseshoe arches looks more like a mosque.

The Mezquita of Cordoba is a beautiful and fascinating 8th-century mosque known for its forest of columns and striped arcades.

This massive Gothic cathedral is brimming with art treasures, including several El Grecos, a 10-foot-high gilded monstrance, and carved altarpieces that stretch to the ceiling.

Dating from the late 19th and 20th centuries, Madrid's cathedral is very new by European standards and its traditional-meets-modern design reflects its youth.

The most visited and photographed sight in Segovia and the symbol of the city, the ancient Roman aqueduct of Segovia boasts a scale and state of preservation unmatched anywhere in Europe.

Built between 1111 and 1124, San Millán is one of the oldest churches in Segovia. It has an ancient tower, open porticoes, figurative carvings and frescoes.

San Clemente is an attractive 13th-century Romanesque church outside the old walls of Segovia.