In this blog post we will go over the best farms you can build in your Minecraft world in 1.21+ version. Let's start off with the community favorite; Iron Farm.
1. Best Iron Farm in 1.21+
Production Rate: 600+ IRON per HOUR
Credits: @MushoDen

This iron farm produces a whopping 6.5K+ iron per hour -- you will quite literally never run out of iron. Personally, I would use the latest "auto-crafters" to automatically turn the ingots into iron blocks. 🌫️
2. Best Gold XP Farm in 1.21+
Production Rate: 1,000+ GOLD BLOCKS per HOUR
Credits: @C.5.

This Gold Farm provides you with 1K+ Gold Blocks every single hour, and if you want to get levels then you're able to go from LVL 0 to 191 in just 1 hour! That one hour will not go to waste for sure...
3. Best Silverfish XP Farm in 1.21+
Production Rate: Level 0 -> Level 43 in 3 minutes!
Credits: @Regund

Gotcha! It looks like that the Gold Farm was not able to beat this one. With this XP Farm you can level yourself from 0 to 43 in just 3 minutes. Enchant, repair, or do anything you want with these bubbles! 🫧
4. Best Ominous Bottle Farm in 1.21+
Production Rate: 390 BOTTLES per HOUR
Credits: @bigbooty17

Bigbooty17 is really designing great farms out here! You will never run out of ominous bottles after building this farm. I don't really think you need THAT many bottles to begin with - I'm sure you'll think of a reason. 😉
5. Best Villager Trading Hall in 1.21+
Credits: @Shulkercraft

I know, I know, this is not really a farm, but I couldn't leave this out of this post. A proper villager trading hall is a MUST-HAVE for every survival or hardcore world. This is a very simple trading hall for all the most used enchantments you may need.
You can definitely expand it to your liking if you want more enchantments!