River valley low poly asset

https://www.cgtrader.com/3d-models/architectural-exterior/landscape/river-valley-bridge-low-poly-asset

https://ua.3dexport.com/3dmodel-river-valley-low-poly-asset-166409.htm

http://www.turbosquid.com/FullPreview/Index.cfm?ID=896830&seo=0

Bridge sci-fi

https://www.cgtrader.com/3d-models/architectural-exterior/sci-fi-fantasy/hi-tech-bridge

http://www.turbosquid.com/FullPreview/Index.cfm?ID=622271&seo=0

Bridge low poly model

https://www.cgtrader.com/3d-models/architectural-exterior/cityscape/bridge--20

http://www.turbosquid.com/FullPreview/Index.cfm?ID=521364&seo=0