the heilong (black dragon) bridge is one of the three natural bridges within wulong karst geology park

adventure asia attraction beautiful bridges cave chongqing china chinese district dragon furong geology geopark gorge green heaven heilong heritage hiking karst landmark landscape limestone mountain municipality natural nature national outdoor park qinglong river rock scenic wonders sightseeing sky south karstwulong stone three tianlong tour tourism tourist town transformer travel unesco valley wulong black bridge one located bridge: lower reach yangsuihe named deep arch looks like called 11m high highest karst-wulong