The Sintra Mountains or locally the Serra De Sintra is a mountain range in western Portugal. Its highest point is (1,736 feet [529 m]) is near Sintra. The range covers about 10 miles (16 km) from the resort town of Sintra to Cabo da Roca on the Atlantic Ocean. It was known to the Ancient World as Lunae Mons (mountains of the Moon) and was the legendary retreat of Diana the Huntress (Cynthia to the Romans, hence Çintra).

Since a long time it has been a place full of myths and legends about supernatural activities and ones without obvious explanation. In 2009 a Portuguese television channel created a television series based on the supernatural environment that is lived in Sintra. The story, set in college in the middle of the mountain tells of an impossible love between a vampire and a human girl, but she also with supernatural powers that are being discovered throughout the episodes.