Castle Hill is a granite monolith, much like the popular Uluru. It is also a large, pink slab of rock that is pretty much the major identifier of Townsville, Queensland. It got its name from Andrew Ball, who was one of the first Europeans to get to the area in the mid 1800s.

Castle Hill serves many purposes. Back in the World War II, it functioned as an observation and communication post. After the war, it found numerous of other uses including a quarry site, residential area, restaurant, and a tourist spot. Today, it is still utilized for such, as well as an educational area where students could learn more about the natural and community history of the locale. Locals also climb it regularly for exercise.