Second Life offers a replica of the Forbidden City in Fantasy China Dynasty Land. This is not the first Second Life rendition of this destination. Back in 2009 there was a much larger version of the Forbidden City built over two sims, that to date remains one of the largest inworld building projects ever completed. Although no longer standing, I produced a You Tube video of this destination which is no longer standing.
Despite the prominence of too much advertising, the current Second Life Forbidden City destination is well done, and makes good usage of textures and scale to give a good indication of the actual destination. It can be visited here: