Estérel is a mountain range located in the Provence-Alpes-Côte d'Azur region of southeastern France. It stretches along the Mediterranean coast, near the city of Cannes. The range is known for its striking red rock formations, which are a result of volcanic activity millions of years ago. The area is popular for outdoor activities such as hiking, biking, and rock climbing, attracting nature enthusiasts and tourists. The Estérel Massif is also home to diverse flora and fauna, making it a valuable ecological site. Its scenic views and proximity to the coast enhance its appeal as a destination.