Ráj is a district of the city of Karviná in Karviná District, Moravian-Silesian Region, Czech Republic. It was a separate municipality but in 1948 became administratively a part of the city of Karviná. It lies in the historical region of Cieszyn Silesia and has a population of 17,142.
The hospital is located there, as well as the football field, home of the local team MFK Karviná.
The name is cultural in origin, literally paradise, fertile and beautiful land.
Wikipedia https://en.wikipedia.org/wiki/Ráj
Coordinates 49°50'34.506" N 18°33'35.829" E