I decided to choose The Great Wall for my 3, 2, 1, project because I am interested in it and I feel it will be cool to learn about and maybe one day take a trip to.
The Great Wall was originally made for war, and the mountains the Wall was built on made for some climbs and uneven stairs that makes the hike up challenging.
Camping is not allowed on the Great Wall yet people still claim watch towers to spend the night in and set up camp.