Today Niebla is a beach resort, but in 1671 it was a defensive fortress built by the order of the Viceroy of Peru to prevent attacks against the town of Valdivia by pirates and corsairs. Niebla is well-known for its lively markets, the remains of the colonial fortress declared a National Monument in 1950 and restored in 1992, and a museum dedicated to its history. Nearby is the charming river port city of Valdivia, where cultural influences from the native Mapuche, Spanish settlers, and German immigrants have blended.