Monte Mario stands as the tallest hill in Rome, reaching a height of 139 meters. This elevated spot offers some of the most impressive panoramic views of the city, including a breathtaking look at the Vatican and the winding Tiber River below.
Visitors to Monte Mario often seek out its famous viewpoints, where the city’s landmarks spread out in every direction. The hill provides an excellent vantage point for photographers and anyone eager to see Rome from above. On clear days, the dome of St. Peter’s Basilica and the rooftops of Rome shine against the sky, making Monte Mario a place for unforgettable cityscapes.
Source - https://en.wikipedia.org/wiki/Monte_Mario