I love these, but I always have this compulsion to dig into the source and try to find the giant asset itself, if it's accessible and not just tiled and streame

I love these, but I always have this compulsion to dig into the source and try to find the giant asset itself, if it's accessible and not just tiled and streamed in like a map. Some museums and collection sites have their source images better obfuscated than others. Anyone else have any luck, for example on getting the full-size pic from this piece? http://www.google.com/culturalinstitute/asset-viewer/the-colosseum-as-seen-from-above/FAGaNw4vi613cg?projectId=art-project http://www.google.com/culturalinstitute/asset-viewer/the-col...