Advent Map 20
Overview
3k, 1.21.5, Survival Skyblock World
Advent Map 20, A 9km² custom Advent Calendar Minecraft Map in the shape of an kinda merged 20, created by McMeddon. Sky high, light as a feather, and bigger than your mo- dern skyblock world. A giant floating skyblock world, with huge mountin ranges, big forests, rivers, lakes, and rugged cliffs. Enjoy your adventure!
Size
Footprint
6,144 × 6,144
blocks, 37.7 km² at one block per metre
Edge to edge
- Happy ghast 28 min
- On foot 24 min
- Minecart 13 min
- Horse 11 min
- Elytra 3 min
Walking, a minecart on powered rails, an average horse and rocket-boosted elytra.
Sizes in the library 76% smaller than this
Most worlds are 4K (87 of them). The largest is MCS SMP Season 3 Server Map #S3 at 9K.
Biome composition
Shares are measured across the built map. Past its edge the world keeps generating normal vanilla Minecraft chunks, so biomes missing from this list can still be found out there.
Land 98.7% of map
-
Plains 87.1% -
Stony Peaks 2.7% -
Jagged Peaks 2.5% -
Jungle 1.7% -
Forest 1.1% -
Beach 1.0% -
Snowy Slopes 1.0% -
Stony Shore 0.8% -
Savanna 0.4% -
Old Growth Pine Taiga 0.4%
12 more 1.4%
-
Frozen Peaks 0.3% -
Birch Forest 0.2% -
Cherry Grove 0.2% -
Flower Forest 0.2% -
Meadow 0.1% -
Mushroom Fields 0.1% -
Taiga 0.1% -
Pale Garden <0.1% -
Snowy Plains <0.1% -
Swamp <0.1% -
Snowy Taiga <0.1% -
Mangrove Swamp <0.1%
Water 1.1% of map
-
River 100.0%
Caves
What this world's caves are made of, by volume, measured from the save in 4 block cells.
- Normal Caves 94.3%
-
Lush Caves 3.5% -
Dripstone Caves 1.8% -
Deep Dark 0.2% - Magma Caves 0.2%
Inferred. These have no biome of their own in Minecraft, so they are named from the blocks around the cave rather than read from the save.
Structure coverage
Counted inside the built map. Past its edge the world keeps generating normal vanilla Minecraft chunks, so structures not confirmed here can still generate out there.
Surface 2/7 confirmed
- Desert pyramids Not checked
- Igloos Not checked
- Jungle pyramids Not checked
- Pillager outposts Included
- Swamp huts Not checked
- Trail ruins Included
- Woodland mansions Not checked
Underground 5/6 confirmed
- Amethyst geodes Included
- Ancient cities Missing
- Dungeons / monster rooms Included
- Mineshafts Included
- Strongholds Included
- Trial chambers Included
Ocean 0/4 confirmed
- Buried treasure Not checked
- Ocean monuments Not checked
- Ocean ruins Not checked
- Shipwrecks Not checked
Portal structures 1/1 confirmed
- Ruined portals Included
Settlements 1/1 confirmed
- Villages Included
Loot tables
Which of the game's loot tables can turn up on this map, read from the world's own files. Confirmed means the scan found the table itself; not observed means the structure carrying it was not seen in this export.
Counted inside the built map. Past its edge the world keeps generating normal vanilla Minecraft chunks, so tables not seen here can still turn up out there.
Chest loot 10/20 confirmed
- Abandoned mineshaft Included
- Buried treasure chest Not observed
- Desert pyramid Not observed
- End City treasure Not observed
- Igloo chest Not observed
- Jungle temple Included
- Jungle temple dispenser Not observed
- Nether fortress bridge Not observed
- Pillager outpost Not observed
- Shipwreck map Included
- Shipwreck supply Included
- Shipwreck treasure Included
- Simple dungeon Included
- Spawn bonus chest Included
- Stronghold corridor Included
- Stronghold crossing Included
- Stronghold library Included
- Underwater ruin (big) Not observed
- Underwater ruin (small) Not observed
- Woodland mansion Not observed
Village chest loot 10/15 confirmed
- Village armorer Included
- Village butcher Not observed
- Village cartographer Included
- Village desert house Not observed
- Village fisher Not observed
- Village fletcher Included
- Village mason Not observed
- Village plains house Included
- Village savanna house Included
- Village snowy house Included
- Village taiga house Included
- Village tannery Included
- Village temple Not observed
- Village toolsmith Included
- Village weaponsmith Included
Archaeology 1/1 confirmed
- Archaeology loot Included
Structure loot 1/1 confirmed
- Trial chamber loot Included
What’s included in Advent Map 20?
See what this Minecraft world contains. Results combine MCA Selector findings, chunk data, level.dat, and manually placed structure pins.
Beta edition: some results are still being verified.
- Seed
- Unknown
- World type
- Unknown
DETAILED INVENTORY Explore the world contents
Search and filter the registries found in this world.
Open the inventory Close the inventory
Explore the world contents
Search and filter the registries found in this world.
Biomes
Biome types found in the existing Overworld.
Structures
StructuresSurface and underground structure types evidenced by existing starts or reviewed markers.
Loot types
Loot typesLoot families evidenced by existing loot-table references.
Animals
AnimalsAnimal types observed in the existing world.
Blocks
BlocksReference inventory only. Missing crafted or dimension-specific IDs are not automatically survival failures.
Cave biomes
Available cave biomes found in the existing Overworld.
Key compatibility details
The most relevant survival features, grouped by category.
No features match these filters.
This report inventories existing save data without loading, generating, or changing chunks. Vanilla terrain may still generate beyond the existing map boundary.
Inspect the world data
The world settings Minecraft stores in level.dat, as captured when this world was scanned. Read only, and player data is never published.
No fields match that search.
Questions about Advent Map 20
- What is Advent Map 20?
-
Advent Map 20 is a hand-made survival world of 6,144 × 6,144 blocks, made with WorldPainter, World Machine, Gaea, Axiom and WorldEdit, built for Minecraft Java 1.21.5. You download the world folder and play it like any other save, in singleplayer or on your own server.
- How big is Advent Map 20?
-
6,144 × 6,144 blocks, so about 38 million blocks of surface. Walking from one edge to the other takes roughly 24 minutes at normal walking speed. The terrain runs from Y -64 to Y 320.
Outside that area the world keeps generating normal vanilla Minecraft chunks, so you never hit a wall, you just leave the built part behind.
- Which Minecraft version does Advent Map 20 need?
-
Advent Map 20 is built for Minecraft Java 1.21.5. Newer releases normally open it fine. Opening it in an older release is not supported: blocks and structures added after that version cannot load, and the world can be damaged by the attempt.
Bedrock players need a converted copy. See the Bedrock notes in the FAQ.
- Which biomes are in Advent Map 20?
-
26 in total. The land is mostly Plains (87.1%), Stony Peaks (2.7%), Jagged Peaks (2.5%) and Jungle (1.7%), counted as shares of the land rather than of the whole map.
Water covers 1.1% of the map, and land 98.7%.
By volume this world's caves are Normal Caves (94.3%), Lush Caves (3.5%) and Dripstone Caves (1.8%). The cave breakdown has the rest.
The full breakdown is further up this page, with every biome and its share.
- Which structures are in Advent Map 20?
-
9 of the 19 structure types the scan checks are confirmed present: surface (2/7), underground (5/6), ocean (0/4), portal structures (1/1) and settlements (1/1).
Not confirmed: Desert pyramids (not checked), Igloos (not checked), Jungle pyramids (not checked), Swamp huts (not checked), Woodland mansions (not checked) and Ancient cities (missing). "Searched, not found" means the scan looked and came up empty; "not checked" means it has not been looked for yet.
The structure list above names every one of them.
- Is Advent Map 20 ready to play in survival?
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Yes. A scan of the world file confirms loot tables, structures, animals and ores, so the survival loop runs from the first night: chests hold the game's real loot tables, mobs spawn as they do anywhere else, and you can mine, farm and build without adding anything. It plays in vanilla Minecraft, with no mods, no datapacks and no creative mode.
The world contents report at the bottom of this page holds the item-by-item detail.
- Where do I download Advent Map 20?
-
From the download link on Google Drive, also on the button at the top of this page.
Also available: the PlanetMinecraft project page, which carries the release notes and the known issues for this particular build.
- Can I look at Advent Map 20 before downloading it?
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Yes. Open it in the 3D explorer and fly the real terrain in your browser, with the biomes, the caves and the marked structures. Nothing to install.
How do I install Advent Map 20 on Java Edition?
- Unpack the archive you downloaded from Google Drive.
- Open your saves folder. On Windows press
Win+Rand enter%appdata%\.minecraft\saves. On macOS it is~/Library/Application Support/minecraft/saves, on Linux~/.minecraft/saves. - Move the unpacked folder in. It must be the folder that contains
level.dat, not a folder wrapping it. - Restart Minecraft on 1.21.5 or newer and pick the world in singleplayer.
Can I play it on Bedrock, or on a server?
Bedrock needs a converted .mcworld copy, and converted worlds carry their own
quirks around spawn, chests and villagers.
For a server, drop the world folder in as the server's world and start it.
What may I do with it?
The worlds are released under CC BY-NC 4.0. The Rights panel on this page lists what that allows and how to credit it.