Asinara

The prison buildings stand open to the salt wind, doors hanging, watchtowers empty, and a white donkey picks its way through the rubble with the calm of an animal that has outlasted every human plan for this place. Asinara lies off Sardinia's northwestern tip, a long, narrow island of macchia scrub, rocky headlands, and water so clean the Marine Protected Area surrounding it ranks among the Mediterranean's most pristine.

Asinara served as a quarantine station, a First World War prison camp, and a maximum-security penal colony for Mafia inmates before its conversion to a national park in 1997. The decades of restricted access left the island's ecosystem largely intact — the resident albino donkeys (Equus asinus var. albina), found nowhere else, have become the park's unofficial symbol. No private vehicles are permitted; visitors explore by electric bus, bicycle, or on foot along former military tracks. The island stretches 18 kilometres in length but rarely exceeds one kilometre in width, creating a landscape of constant sea views. Former prison structures at Cala d'Oliva, Fornelli, and Trabuccato can be visited on guided tours that trace the island's layered and often harrowing human history.