Google street view has added interactive images of pre-Hispanic ruins, such as the pyramids of Teotihuacan, on street view. This allows people to look around an archaeological area through the photographs taken by various people from different angles. As it is a new development it still needs a bit of work (that is, more photographs), however I believe it is a great way to document archaeological sites photographically and hope that in future archaeologists can use this for their own sites.
The article discussing this can be found here.
To see an example of this check out this Google Street View.