diff --git a/core/src/main/java/mc/core/world/Region.java b/core/src/main/java/mc/core/world/Region.java
new file mode 100644
index 0000000..615af3e
--- /dev/null
+++ b/core/src/main/java/mc/core/world/Region.java
@@ -0,0 +1,17 @@
+package mc.core.world;
+
+/**
+ * Simple world generation unit
+ * 16x16x16 chunks
+ */
+public interface Region {
+    Chunk getChunkAt(int x, int y, int z);
+    void setChunk(int x, int y, int z, Chunk chunk);
+
+    int getX();
+    int getY();
+    int getZ();
+
+    Biome getBiomeAt (int x, int z);
+    void setBiome (int x, int z, Biome biome);
+}
diff --git a/core/src/main/java/mc/core/world/WorldGenerator.java b/core/src/main/java/mc/core/world/WorldGenerator.java
index 4b5fd30..817012c 100644
--- a/core/src/main/java/mc/core/world/WorldGenerator.java
+++ b/core/src/main/java/mc/core/world/WorldGenerator.java
@@ -2,5 +2,5 @@ package mc.core.world;
 
 public interface WorldGenerator {
 
-    Chunk generateChunk (int x, int z, World world);
+    Region generateRegion (int x, int z, World world);
 }