Ancient City Northwest of a Forest Start, Badlands Beyond — Java 26.3

An Ancient City about 225 blocks north-west of spawn, with Stony Peaks and wide Badlands within a few hundred blocks.

Top-down 2D biome map centred on a forest spawn marker, with markers for the Ancient City to the north-west, a Ruined Portal to the south-east and surrounding savanna, badlands and peak biomes.
Java 26.3 Edition Java Spawn -40, -8 Biome Forest Structures 2
Ancient CityBadlandsForestPlainsSavannaWooded BadlandsRuined PortalStrongholdMountainRiver
Open in the seed map →
Seed 8243720089383153448

Copy it into Minecraft 26.3 (Java).

The headline here is an Ancient City about 225 blocks north-west of spawn, close enough to reach early in a run. You start standing in Forest, but the terrain shifts fast: Savanna and Plains patches sit about 128 blocks out, Stony Peaks about 286 blocks away, and large Badlands and Wooded Badlands fields about 320 blocks off. A Ruined Portal sits about 247 blocks south-east, and the Stronghold is far out at about 1900 blocks.

Structures near spawn
Ancient City ↖ NW -144, -208 225
Ruined Portal ↘ SE 80, 208 247
💎 Diamonds, open to a cave ↙ SW -66, 32 Y -44 48
💎 Diamonds, dig down ↑ N -41, -11 Y -61 3
Biome mix near spawn
Forest 21%
Wooded Badlands 16%
Badlands 15%
Savanna Plateau 15%
Savanna 10%
Plains 6%
River 4%