It is located at 80 nautical miles to the southeast of Punta Arenas and the west of Puerto Williams, with a surface of 1,460,000 hectares in a mountainous area where Darwin Mountain Range stands out. The area comprises a vast peninsula and associated islands, strongly mountainous, covered by extensive ice fields and a great number of glaciers and snowdrifts that climb down by the hillsides to the different fiords, small bays and channels.

As for the climate, the year oscillation of the average temperature is small; it does not go up more than 10°C in summer and does not go down more than 0°C in winter. There is heavy rainfall, reaching 1,000 mm. yearly, with a relative air humidity of about 80%.