Built around 250 BC, the World Cultural Heritage Site Dujiangyan Irrigation System was built with dynamite to create a path through the mountains. Another World Heritage Site, Jiuzhaigou Valley or "Valley of Nine Villages" is a nature reserve replete with waterfalls and lakes - the Pearl Waterfall is a standout. From Mount Emei, one of the four Buddhist mountains in China, enjoy a bird's eye view of Sichuan Province - spotting the multi-coloured 'Buddha Rays' that appear regularly. Opposite is the Leshan Giant Buddha stone sculpture - at 71m, the world's tallest Buddha statue.