OneChunkMap3.zip is a release file of the Minecraft map One Chunk - Mystery World - Chunk Wrapped in Bedrock, made for Minecraft 1.19.2. It was published on January 21, 2023 and is 8.8 MB in size. For the full description, screenshots and every other version, visit the One Chunk - Mystery World - Chunk Wrapped in Bedrock map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.