Penteli Mountain is located in Greece, near the city of Athens. It is part of the Penteli mountain range and is known for its beautiful landscapes and rich biodiversity. The mountain reaches an elevation of about 1,109 meters and is primarily composed of limestone. The area is famous for its white marble, which was used in ancient structures, including the Parthenon. Penteli Mountain is also a popular destination for outdoor activities such as hiking and mountain biking, attracting both locals and tourists who enjoy its scenic views and natural beauty.