Pena Palace, located in Sintra, Portugal, is a stunning 19th-century Romanticist castle. It boasts a vibrant mix of architectural styles, including Neo-Manueline and Moorish influences. Constructed in 1847, it was once a monastery and later transformed into a royal summer residence by King Ferdinand II. Pena Palace is renowned for its vibrant, multicolored façade, picturesque hilltop location, and lush surrounding gardens. It's a UNESCO World Heritage Site and one of Portugal's most iconic landmarks, drawing tourists from around the world.