Have you wanted to return to Megaton in fallout 4 well now you can. Youtuber Final Render has built a to scale version of the twisty maze of a town and offered up the save file for the town. you will need the cell ripper to install. Never tried this before so let me know any issues such as do i need to upload a list of mod's used etc. Hope you enjoy the walk around Megaton. Just add it to your save game files and find my save game or use the cellripper tool to add the settlement to your own save game.
The youtube video description contains mods you will need to get the place running.