Minecraft wiki entry for Pillar, associated text: Obsidian pillar, a generated structure in the End
Basalt pillar, a generated structure in the Nether
Purpur Pillar, a decoration block that naturally generates in end city dungeons and end ships
Quartz Pillar, a decoration block crafted from quartz blocks
Glass pillar, a removed type of pillar that used to marked strongholds
A type of cave structure composed of pointed dripstone
"pillars", an Easter Egg dimension in Java Edition 20w14∞