Mada'in Saleh is a very special place in Saudi Arabia where a long time ago, many people used to live. They built beautiful homes and very big and impressive tombs for their loved ones who had passed away.
These tombs were carved into the mountains, which means that instead of building the tombs out of rocks, they would take out chunks of rock to create the tomb space. This is kind of like if you were to dig a hole in the ground to make a pool.
The people who lived in Mada'in Saleh were called Nabateans, and they were really smart because they used an incredibly special technique to create their homes and tombs. They knew how to collect water from the mountains and bring it to their homes using underground pipes, which is really cool when you think about it!
Today, you can visit Mada'in Saleh to see the incredible tombs and homes that were built there a long time ago. It is important to preserve these special buildings because they show us how smart and creative people were in the past, and they are a part of history that we can learn from and enjoy.