Nuraghe Arrubiu, known as the “Red Giant,” is one of the largest and most impressive nuraghi in Sardinia, located near the town of Orroli. Built around 1500–1200 BCE during the Nuragic Bronze Age, it originally stood over 25 meters tall, making it one of the tallest structures in prehistoric Europe.

The complex is designed in a rare pentalobate form, with a massive central tower surrounded by five smaller towers, later reinforced by additional walls and towers to form a fortress of about 21 towers in total.

Covering an area of nearly 5,000 square meters, the site includes courtyards, stairways, corridors, tholos-style domed chambers, and a sophisticated water system with a cistern. Excavations have revealed local pottery, tools, and even imported Mycenaean ceramics, showing that the community had contacts with the wider Mediterranean world.

The site also preserves evidence of daily life and ritual practices, and in Roman times, parts of the structure were reused as wine-making facilities. Today, Nuraghe Arrubiu stands as a monumental symbol of the engineering skill and cultural vitality of the ancient Nuragic civilization.