Olza is a river located in Central Europe, primarily flowing through Poland and Czech Republic. It is a tributary of the Odra River, contributing to the region's water system. The river spans approximately 90 kilometers and is known for its scenic landscapes and natural beauty. The Olza River serves as a natural border between Poland and Czech Republic in some areas, making it significant for both countries. It supports local ecosystems and provides recreational opportunities for residents and visitors, such as fishing and hiking along its banks.