The Kolpa River is a river located in southeastern Europe, primarily flowing through Slovenia and Croatia. It is approximately 297 kilometers long and is known for its picturesque landscapes and clear waters. The river serves as a natural border between the two countries for a significant portion of its course. The Kolpa River is popular for various recreational activities, including kayaking, fishing, and swimming. Its surrounding areas are rich in biodiversity, making it an important habitat for various species of flora and fauna. The river also plays a vital role in local agriculture and tourism, contributing to the economy of the region.