An alcázar is like a big castle with lots of walls, towers, and buildings. Imagine a really cool playground with big walls you can climb on and lots of hideout spots. The alcázar is made of bricks and stones and some are very old, like really, really old. It used to be a place where kings and queens lived a long, long time ago. Now, people can visit and explore it to learn about history and be amazed by the big walls and towers. It's like a giant playground with a lot of history in it!