Caves&CliffsBackportAdditions-3.0.jar is a release file of the Minecraft mod Caves & Cliffs Backport (Additions) for Forge, made for Minecraft 1.16.5. It was published on April 27, 2022 and is 3.5 MB in size. For the full description, screenshots and every other version, visit the Caves & Cliffs Backport (Additions) mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.