URBAN_3.21 is a release file of the Minecraft resource pack URBAN 128x|256x|512x|1024x, made for Minecraft 1.20.2. It was published on October 20, 2023 and is 59.5 MB in size. For the full description, screenshots and every other version, visit the URBAN 128x|256x|512x|1024x resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.