thumb|230px|A village by the river Olza
thumb|230px|A village by the river Olza
Koukolná (, ) is a village in Karviná District, Moravian-Silesian Region, Czech Republic. It was first mentioned in 1447 and was a separate municipality, but became administratively a part of Dětmarovice in years 1872–1875. It has an area of 1,78 km2, and in 2001 it had a population of 243.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).