A map the size of Eurasia

Lol I know. I have no doubt I’ll probably end up never detail more than .0001% of a map that size. I’m here just asking if its actually possible to have a map that big without completely blowing up my computer just trying to open it! I’m just taking stock of what my options are. Again, my goal is to just be able to walk around it myself and look at how pretty I can make it. I’m not concerned with making a multiplayer game or even a singleplayer game, just a map to walk around and see how much of this house I can decorate. So I’m just seeing if its possible to do if you strip out those gameplay elements to worry about