Castle Hill is a red rock monolith in the heart of Townsville offering panoramic views, and a slice of military history. There is a popular walking track for fitness focused locals, with a rocky "goat track" a favourite for shedding those unwanted kilos. A road offers access for vehicles and pedestrians. The hill is just metres short of being classified as a mountain.

The rock face is home to Townsville's iconic "saint" - a graffiti rendition of the popular television show's stick figure emblem. The Hill's vantage was used by visiting American soldiers during World War II. According to local legend, the visitors famously offered to demolish the hill and use the rock to build a bridge to Magnetic Island. A World War II observation bunker sits on one corner of the hill, which also boasts public amenities, a function centre and car parking to those wanting to enjoy the best view of Magnetic Island.