Okay, kiddo, Julian's Bower is a really cool maze that was made a long time ago in England. It's a bunch of grassy paths that twist and turn and cross over each other. People used to go there and have fun trying to navigate through it without getting lost.
Imagine you're walking down a path, and then suddenly you come to a junction where there are three paths to choose from. Which one do you take? Julian's Bower has lots of places like that where you have to make decisions about which way to go.
It's sort of like a big puzzle that you can walk around in. People think it was made to help train soldiers in navigation and strategy, but it's also just fun to explore. Today, Julian's Bower is a famous landmark and people still visit it to experience the maze for themselves.