Taman Panorama, on the southern edge of town, overlooks the deep Ngarai Sianok (Sianok Canyon), where fruit bats swoop at sunset. Friendly guides will approach visitors to lead you through Gua Jepang, wartime defensive tunnels built by Japanese slave labour; settle on a price (around 30,000Rp) before continuing. Another path (and extra admission) gives you access to the Koto Gadang (Great Wall), a cheesy scaled-down Great Wall of China.