Pena National Palace – located in São Pedro de Penaferrim, Sintra, Portugal. It was built in 1842 by King Ferdinand II; the Pena National Palace is one of the oldest European castles in the Romanticism style. The palace was built on the ruins of a monastery severely damaged in the Great Lisbon Earthquake of 1755. Today, with its original colors of red and yellow restored, the Pena National Palace is one of Portugal’s most visited monuments. This Palace is also UNESCO WORLD Heritage Site. Pena Palace is surrounded by the vast forested area, known as The Pena Park.