The virtual tour might be on the Virtual Memory Palaces wiki page.
If it isn’t found in one of the links there, try typing “virtual tour” into the search box and that will bring up some forum threads about it.
I think that the locations in a memory palace don’t have to be out of the ordinary themselves, though they can be if you prefer. I started a list of some websites that contain memorable images here: Websites for Finding Memorable Images.