Cagliari, the capital city of the Province of Sardinia, is a place that stands out for its harmony between history, nature, and a sea capable of enchanting visitors in every season. The Gulf of Angels, on which the city overlooks, is one of the most fascinating marine environments in the Mediterranean, characterized by clear waters, rich seabeds, and panoramic views that change color with the light. For this reason, Cagliari is considered a privileged starting point for discovering the southern coast of the island from an authentic and close perspective: that of the sea. Observing Cagliari from the water makes it possible to capture details that often remain hidden from land. One of the most recognizable symbols is the Sella del Diavolo, the promontory that dominates the gulf with its distinctive shape. Seen from offshore, the limestone cliffs reveal their textures, natural cavities, and small inlets that sculpt their profile. Continuing along the coast, the transparent waters of Calamosca and Cala Fighera appear, where the colors of the sea blend with the white rocks and the green of the Mediterranean vegetation. The Poetto area, the long city beach stretching for about eight kilometers, reveals from the sea its full expanse and the variety of its sections. Further along, towards the less frequented shores, the coastline offers small coves accessible almost exclusively by sea, often protected by rocky walls and characterized by seabeds rich in marine life and posidonia meadows. Alongside its marine beauty, Cagliari also preserves a cultural and architectural heritage of great interest. The Castello district, perched on the highest hill, offers panoramic views over the sea and the city, as well as historical landmarks such as medieval towers, the Cathedral, and the Royal Palace. The historic districts of Marina, Stampace, and Villanova reflect the city’s daily life through narrow streets, ancient churches, and period buildings. Walking through the center, one encounters traces of the various civilizations that have inhabited the area over the centuries, including the Romans, Pisans, and Aragonese, making Cagliari a place rich in identity and traditions.