The peculiarity of the province of Teramo is that it is characterized by the eastern side of the Abruzzi Apennines and valleys that slope gently down to the Adriatic coast. Two of the most important mountain areas of the Apennines, Gran Sasso d’Italia and the Laga massif are in the province of Teramo. The Gran Sasso d’Italia marks the western border of the province and culminates with the Corno Grande peak.
The same massif includes the Calderone glacier. The inaccessible walls of the Gran Sasso have a different morphology compared to the Laga massif, in the far north of the province, which is the kingdom of forests, beautiful gorges, and spectacular waterfalls. To the east, along the coast of the Adriatic Sea, the seaside towns of the province are known as the Seven Sisters and are characterized by sandy beaches, typical Mediterranean climate, and palm trees, pine trees, and oleanders.
Most of the territory of Teramo is hilly: several rivers flow along the valleys, including the Vomano River.