Top 10 Best Minecraft 1.21 Cave Seeds

Caves are super common in Minecraft world seeds, and the best ones are packed with valuable loot or unique structures. These dark, creepy caverns are crawling with dangerous mobs, but if you’re bold enough to explore them, you’ll find tons of useful stuff. Whether you’re looking to build a sweet underground base or find a path to The End, a good cave seed opens up all kinds of possibilities.

Here’s a showcase of some solid cave seeds to play in 1.21.

1. Blacksmith Kingdom

Seed: 3942819840089879809

This is hands-down the best cave seed. It’s got Dripstone and Lush Caves, plus a village partially built underground in an exposed Lush Cave. You’ll find around eight Blacksmith Villagers crafting Iron Armor, weapons, and tools—some of the best early-game gear. The village is a solid base for exploring the surrounding caves, which are packed with rare resources. It’s a perfect mix of civilization and adventure for tackling Minecraft’s toughest biome.

2. Mineshaft Of Many Treasures

Seed: 867677604900324654

You start deep in a cave with both Dripstone and Lush biomes, plus a sprawling Abandoned Mineshaft packed with over 20 treasure chests. It’s like a dungeon crawl with tons of gear and supplies to grab. A huge waterfall marks the center, making it easy to find your way out when you’re done. This seed’s perfect for players who love looting and exploring.

3. The Hollow Mountain

Seed: -3287822446893397

This seed is straight-up gorgeous, with a Lush Cave carved into the side of a mountain surrounded by forests. Find it at coordinates (-275, 214, 99). The cave’s high up, safe from mobs, and offers a killer view. It’s not ideal for speedrunning, but it’s perfect for building a scenic base and gathering resources without wandering too far.

4. Underground Village Of Dripstone

Seed: 2929192631388581213

Villages in caves? Yeah, this seed’s got one. You spawn in a Dripstone Cave with a full-on village built underground, lit up by sunlight so no hostile mobs spawn during the day. It’s a weird but awesome spot. There’s a bigger settlement on the surface, but you can use the cave village as a base to gather supplies and explore the massive caverns stretching into nearby mountains.

5. Caverns Of Ancient Trials

Seed: 9188168668198060127

This seed is intense, spawning you in an Ancient City where the Warden will hunt you down. You’ll need to sneak through the dark, maze-like ruins to survive and grab loot. It’s a tough start, but if you stick it out, you can hit up Trial Chambers for more gear. This one’s for seasoned players who can handle combat with minimal supplies in a high-pressure cave filled with danger.

6. Island Of Lush Secrets

Seed: 5131816260313623716

If you want a remote cave adventure, this seed drops you on an isolated island with hidden structures and a Lush Cave tucked inside. The underground is a maze of bright tunnels and flowing lava, with multiple Lush Cave systems to explore. It’s a great spot for ambitious players who want to link all the caves into one giant underground network or just enjoy a secluded base away from the world.

7. Lush Tunnel Network

Seed: -3862205375634595895

This seed puts you in a Desert Village right next to a Ravine, perfect for gearing up before diving into the caves. The villagers are ready to trade for basic supplies, and there’s a Ruined Nether Portal for quick realm-hopping. You can also raid a nearby Jungle Temple for some cool loot. Below the village, a Ravine connects two Lush Caves, forming a long, safe path with barely any mobs. It’s great for mining resources like Emeralds to trade with villagers or setting up a big underground base.

8. Abandoned Gateway Cave

Seed: 5246631040738479991

You spawn in a huge Dripstone Cave that’s just screaming to be explored. It’s got some hostile mobs, but you start near a treasure chest with basic gear, like armor and a solid weapon, to help you survive. The big draw here is a massive Ruined Nether Portal. If you’re aiming for The End, this is your ticket to the Nether for Blaze Rods. The cave’s got tons of resources to fix up the portal, and once you’re in the Nether, you can trade with Piglins or check out the eerie Warped Forest.

9. Escape From The Great Lava Cave

Seed: -77584400428415136

This seed throws you into a cave surrounded by lava pools flowing into a fiery lake—talk about a spicy start. Your goal might be to climb out to the surface, which you can see way above through layers of this deep cave. Pro tip: pour water on lava to make safe Obsidian or Cobblestone paths. As you climb, the cave shifts from a lava-filled nightmare to a stunning Lush Cave. The surface has wintery biomes, but don’t skip exploring the cave’s layers for hidden structures like a Trial Chamber.

10. Decaying Cave Under Mushrooms

Seed: 1920597807115725671

You start on a Mooshroom Island, a rare biome you don’t see in most worlds. It’s surrounded by a bunch of different biomes, but the real star is a huge hole in the island’s center that drops into a massive cave system. It’s practically begging you to jump in, with plenty of resources right from the start. The mushrooms on the island are great for crafting food to fuel your cave adventure. No major structures here, but the cave’s bright and easy to navigate, with fewer mobs spawning thanks to the surface light. You can even turn it into tunnels to reach the mainland.