thumb|350px|The natural regions of Belgium
thumb|350px|The natural regions of Belgium
The Calestienne (Walloon: Calistinne), a 130-kilometer-long, narrow strip primarily composed of limestone rock (mainly Givetian), stretches across both Belgium's Wallonia region and a small portion of France. Reaching a maximum altitude of nearly 300 meters, this region's distinctive relief is the result of significant erosion.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).