Any free basic vehicle,etc. assets?

I love creating 3d models of houses, cities,… and then rendering them in game engines, also adding trains and then animating them to give the world some life,etc. I don’t however like to create characters, vegetation, skyboxes, vehicles and other basic stuff. I am interested in archviz type of stuff only, but a little more gamey. So…is there any free pack that has some vehicles, vegetation and stuff like that? At least something?

Previously I used the sandbox editor for Crysis and that gave me access to all the vehicles, vegetation, characters, animals and everything else in the editor and I didn’t have to do anything other than import my own stuff onto the map and that was it. So is there something at least partially similar here?