The Rio Guadiana is one of the longest rivers in the Iberian Peninsula, flowing approximately 744 kilometers. It originates in the Sierra de Cuenca mountains in Spain and travels through Portugal before emptying into the Atlantic Ocean. The river serves as a natural border between the two countries for part of its course. The Guadiana is significant for its ecological diversity and historical importance. It supports various wildlife habitats and has been a vital water source for agriculture and communities along its banks. The river is also known for its picturesque landscapes and cultural heritage, attracting tourists and nature enthusiasts.