Spain is home to numerous historical sites that reflect its rich cultural heritage. One of the most famous is the Alhambra, a stunning palace and fortress complex in Granada that showcases Islamic architecture. Another significant site is the Sagrada Familia in Barcelona, designed by the architect Antoni Gaudí, which combines Gothic and Art Nouveau styles. Other notable historical sites include the Roman Aqueduct in Segovia, an impressive engineering feat, and the Mezquita in Córdoba, a former mosque that exemplifies the beauty of Moorish architecture. Each of these sites offers a glimpse into Spain's diverse history and architectural evolution.