Mount Penteli is a mountain located in Greece, specifically in the region of Attica. It rises to an elevation of 1,109 meters and is known for its white marble, which was used in ancient structures, including the Parthenon. The mountain is part of the Penteli mountain range and is characterized by its lush pine forests and diverse wildlife. The area around Mount Penteli is popular for outdoor activities such as hiking and mountain biking. It offers stunning views of the surrounding landscape, including the city of Athens and the nearby Saronic Gulf. The mountain also has historical significance, with ancient quarries that date back to classical times.