Portugal is home to numerous castles that reflect its rich history and architectural diversity. Many of these structures date back to the Middle Ages, serving as fortifications during the Reconquista, a period when Christian kingdoms sought to reclaim territory from the Moors. Notable examples include the Castle of São Jorge in Lisbon and the Castle of Óbidos, both showcasing stunning views and intricate designs. These castles often feature thick stone walls, towers, and battlements, designed for defense. Today, they attract tourists and history enthusiasts, offering insights into Portugal's past. Many castles, like the Pena Palace in Sintra, blend different architectural styles, making them unique landmarks in the country.