The full size image can be found here.
The size of the complete map is 48gb unpacked and 33gb packed. The zip archive is splitted in 8 parts, to reduce the filesize of each download. You need to download all 8 files. Use 7zip or WinRAR and select the *.zip.001 file to unzip the map. If the regular download link isn’t working, try the mirror link or a different hoster. Both link to the same file.
The map is compatible with Minecraft version 1.16.