Woodland Mansion West of a Plains and Forest Start — Java 26.3

A mansion about 620 blocks west, an Ancient City to the north-east, and mixed forests around a plains spawn.

Top-down 2D biome map centred on the spawn point, with a spawn marker and markers for the Woodland Mansion, Ancient City and Pillager Outpost.
Java 26.3 Edition Java Spawn 8, 8 Biome Plains Structures 3
Cherry GroveAncient CityWoodland MansionBirch ForestDark ForestFlower ForestForestMeadowOceanOld Growth Birch ForestOld Growth Spruce TaigaPlains
Open in the seed map →
Seed 779595877698778531

Copy it into Minecraft 26.3 (Java).

The headline here is a Woodland Mansion about 620 blocks west of spawn, at roughly (-608, 80), which makes it a reachable early target. You start in Plains, with Forest and a River patch about 64 blocks away. An Ancient City sits about 290 blocks north-east, and a Pillager Outpost about 566 blocks north-east. Birch and dark forests fill out the surroundings, and the nearest Stronghold is about 1754 blocks away.

Structures near spawn
Ancient City ↗ NE 128, -256 290
Pillager Outpost ↗ NE 320, -464 566
Woodland Mansion ← W -608, 80 620
💎 Diamonds, open to a cave → E 48, 2 Y -20 40
💎 Diamonds, dig down ↖ NW 6, 7 Y -36 2
Biome mix near spawn
Forest 22%
Plains 13%
River 10%
Dark Forest 7%
Sunflower Plains 6%
Ocean 6%
Birch Forest 6%