Castelo de Pena is a colorful Romanticist castle located in Sintra, Portugal. Built in the 19th century, it sits atop a hill, offering stunning views of the surrounding landscape. The castle features a mix of architectural styles, including Gothic, Manueline, and Moorish influences, making it a unique example of 19th-century design. The castle is part of the Sintra Cultural Landscape, a UNESCO World Heritage site. Visitors can explore its ornate interiors, lush gardens, and impressive towers. Castelo de Pena is one of the most popular tourist attractions in Portugal, drawing thousands of visitors each year.