The Alcázar of Seville is a stunning palace complex that was built by the Moors in the 10th century. It is a UNESCO World Heritage Site and is one of the most popular tourist attractions in Seville. The palace is known for its intricate tile work, beautiful gardens, and stunning architecture. Visitors can explore the palace's many rooms and courtyards, including the Hall of Ambassadors, which is considered one of the most beautiful rooms in the world.