Easiest way to install custom Minecraft maps (Java Edition) 1.) Download the map that is going to be installed.

Minecraft custom maps allow players to experience the game in virtually any setting imaginable. These maps are created by players and can be downloaded online.

If you enjoy creating custom worlds for Minecraft, you'll be a big fan of the 20W28A snapshot for Minecraft: Java Edition, which continues adding fixes and improvements to the Nether Update.