Lunch: Cerro Sombrero
From Bahía Azul, a short drive south brings you to the turnoff for Cerro Sombrero, a detour of less than a kilometre from the main road.
Cerro Sombrero is one of the stranger places in southern South America: a complete mid-century company town built between 1958 and 1961 by ENAP, the Chilean state petroleum company, after oil was discovered in the Tierra del Fuego steppe in 1945. It was designed as a self-contained community for oil workers and their families, and it arrived fully formed — housing, a cinema, a bowling alley, a swimming pool, a botanical garden, a church, a hospital, and a supermarket. It has been recognised as a Zona Típica and historical monument by Chile's Council of National Monuments, and was described by one architecture journal as the southernmost work of modern architecture in the world. The town has a free picnic area by the river — a good spot to eat if you've brought supplies — along with clean public bathrooms and showers. The supermarket stocks provisions if you need to top up before continuing.