megalvl1 (7).zip is a release file of the Minecraft map Mosaic of Worlds, made for Minecraft 1.20.1. It was published on August 22, 2025 and is 86.5 MB in size. For the full description, screenshots and every other version, visit the Mosaic of Worlds map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.