The Estérel Massif 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 massif is known for its striking red volcanic rock formations, which create a dramatic contrast with the blue sea and green vegetation. The area is popular for outdoor activities such as hiking, biking, and rock climbing. The Estérel offers numerous trails that provide stunning views of the coastline and surrounding landscapes. It is also home to diverse flora and fauna, making it a valuable natural habitat.