The Alcázar of Seville is a royal palace built in the 14th century and is a UNESCO World Heritage Site. It is a perfect place to visit on a rainy afternoon in Seville. The palace has beautiful gardens, intricate architecture, and stunning tile work. You can spend hours exploring the different rooms and admiring the beauty of the palace. The Alcázar is also home to a collection of tapestries and artwork that are worth seeing.