Why is the holy land so important to 3 major religions

For Christians, Jesus was crucified in Jerusalem. For Muslims, the first thing in that there is a mosque there that is considered 3rd holiest place in the world to them. The second thing is that and there is a thing called the Shrine of the Dome of the Rocks which is the place that Muslims believe that Muhammed ascended into heaven. And for Jewish people, there is this thing called Kotel, or "western wall" where they believe was the foundation block of the Earth and also the closest they can pray to the holiest of the holiest.