Okay, so imagine you're in a really old city called "Tell." This city is so old that people used to build walls around it to protect themselves from enemies. But in order to get in and out of the city, they needed a special door called a gate.
Now, the Canaanites were a group of people who lived in the area where Tell is located a long time ago. And they built a gate that was extra special because it was big and strong and had lots of cool decorations on it.
But now, many years have passed, and the city of Tell is no longer inhabited. But people still visit it to see the old gate that the Canaanites built. And even though it's really old and has been damaged over time, you can still see how it used to look and imagine what it must have been like to walk through it when the city was still alive.