Uluru is the most famous, but not the only huge monolith in Australia. Another is Castle Hill, a huge pink granite rock. Paved roads go to the summit of Castle Hill, offering excellent views of the coastal city of Townsville below. Castle Hill served an important purpose for the area in WWII when military bases and defensive batteries were installed there. Rumors from the era indicate a network of underground tunnels were built under Castle Hill and even a bunker inside the Hill, lending some urban legend mystique to the site. Today there are several tunnels where the entrances are cordoned off by steel poles, giving credence to the legend.