Since we're on the topic of other lists - I recently found this site:
http://archive.cyark.org/It's a non-profit organization that wants to create 3D images of the most important heritage sites to preserve them digitally. For now, they aim at 500 sites (taken seemingly randomly from WHS, the WMF lists and the US NHL list. The president of ICOMOS and the president of the WMF are both on its advisory council.
Further sites can be proposed. Els: the Neolithic Flint Mines are still missing.