How many "Swamp Ruin" does one Valheim world place?

Swamp Ruin is placed by 2 separate generator rules — SwampRuin1: 30 placement attempts; SwampRuin2: 30 placement attempts.

Where does Swamp Ruin spawn?

Swamp Ruin generates in Swamp, under the “Median” rule — the zone and all eight of its neighbours must share the biome. Altitude: -0.5–1,000 m.

How far is the nearest Swamp Ruin from spawn?

Measured over 600 sampled worlds, the closest copy was 2,000 m from the spawn area, the typical distance was 2,491 m, and in 9 worlds out of 10 it sat within 3,400 m. All distances are straight-line.

How much space does Swamp Ruin need to generate?

The generator keeps a 12 m exclusion radius clear around each placement and requires at least 256 m to the nearest similar placement, with terrain varying by no more than 3 m across the footprint. The exclusion radius is clearance the terrain must offer, not the size of the structure you walk into.

Locations

Swamp Ruin — Valheim Location

Swamp Ruin world-generation rules in Valheim 1.0: how many copies a world places, the biome and altitude it needs, its spacing and footprint, and how far the nearest copy sits from spawn.

Ruin Swamp Verified 1.0

Find Swamp Ruin on the map from seed The map centres the first copy it finds in the world on screen.

If the name comes up struck through, this world has no room for it — type your own seed and the map looks again.

Nearest copy over 600 sampled worlds generated by our world map: closest seen 2,000 m, typical 2,491 m, and in 9 worlds out of 10 within 3,400 m — straight-line from the spawn area.

Loading map…

0 · Swamp Ruin

Open in full map

How it generates

Prefab	Per world	Biome area	Altitude	Min spacing	Footprint
SwampRuin1	30	Median	-0.5–1,000 m	≥ 256 m	12 m radius
SwampRuin2	30	Median	-0.5–1,000 m	≥ 256 m	10 m radius

Biome area — “Median” means the zone and all eight of its neighbours must share the biome, so it never generates on a biome border; “Everything” may place anywhere inside the biome.
Footprint is the exclusion radius the generator keeps clear around the piece, not the size of the structure you walk into.
Per world counts placement attempts, so a number here is an upper bound — terrain checks decide how many actually land (see the sampled-worlds figures above). unique is a separate flag: the table checks it once before placement begins, to skip re-rolling these on a world that already exists, and it does not cap the attempts a fresh world makes.
Terrain tolerance — the generator allows up to 3 / 3 m of height change across the footprint (no minimum) .

Where to find it

Swamp guide

Other ruin placements

Find one in your world

The interactive map generates your world from its seed and marks every one of these, or use the seed finder to search for a world that places them the way you want.

Common questions

How many "Swamp Ruin" does one Valheim world place?: Swamp Ruin is placed by 2 separate generator rules — SwampRuin1: 30 placement attempts; SwampRuin2: 30 placement attempts.
Where does Swamp Ruin spawn?: Swamp Ruin generates in Swamp, under the “Median” rule — the zone and all eight of its neighbours must share the biome. Altitude: -0.5–1,000 m.
How far is the nearest Swamp Ruin from spawn?: Measured over 600 sampled worlds, the closest copy was 2,000 m from the spawn area, the typical distance was 2,491 m, and in 9 worlds out of 10 it sat within 3,400 m. All distances are straight-line.
How much space does Swamp Ruin need to generate?: The generator keeps a 12 m exclusion radius clear around each placement and requires at least 256 m to the nearest similar placement, with terrain varying by no more than 3 m across the footprint. The exclusion radius is clearance the terrain must offer, not the size of the structure you walk into.