Punta Delgada lighthouse, Historical lighthouse in San Gregorio, Chile.

Punta Delgada lighthouse is a cylindrical cast-iron tower, 12 m high, painted white with a red band and a red lantern dome, mounted on a concrete masonry base. It is attached to a keeper's house with a red roof, and the tower supports measuring and transmission equipment. The light, at a focal height of 18 m, flashes white every 5 seconds and reaches 19 nautical miles.

The lighthouse was designed and built in 1898 by British engineer George Henry Slight, who worked on developing navigation markers for the Chilean coast. Its construction was part of a broader effort to improve maritime safety in this dangerous region.

The lighthouse shares its name with the Punta Delgada settlement on the north shore of Primera Angostura, where ferries carry vehicles and passengers across to Tierra del Fuego. Like the Punta Ángeles lighthouse, it holds a museum of objects used in local maritime work, and its gallery gives a panoramic view over the strait's first narrows.

The lighthouse stands on the north shore of Primera Angostura, 167 km from Punta Arenas, beside the ferry crossing between Punta Delgada and Cerro Sombrero. The site is reached by road from Punta Arenas, not by boat. The tower is attached to the keeper's house, and the museum and panoramic view of the strait are visited on foot.

The lighthouse maintains its working function with a white light signal that flashes every five seconds and can warn ships from great distances. It was declared a national monument in 2009 to protect its architectural form and historical value.