Diego Ramírez Islands in the context of "Antártica Chilena Province"

Antártica Chilena Province (Spanish: Provincia Antártica Chilena) is the southernmost of the four provinces in Chile's southernmost region, Magallanes and Antártica Chilena Region (XII). The capital is Puerto Williams. The province comprises the extreme southern part of Isla Grande de Tierra del Fuego (south of the Cordillera Darwin), the islands south and west of Isla Grande (Diego Ramírez Islands and its National Park, Diego Ramirez Islands & Drake Passage National Park), and Chile's claims in Antarctica. The province is administratively divided into two communes (comunas): Cabo de Hornos, located at the southern tip of South America, and Antártica, a wedge-shaped claim of Antarctica, which is not internationally recognized. Its total area of 1,265,853.7 km (488,749 sq mi) makes it almost twice as large as all other provinces of Chile combined.

Tierra del Fuego (/tiˈɛrə dɛl ˈfweɪɡoʊ/; Spanish: [ˈtjera ðel ˈfweɣo]; Spanish for 'Land of Fire'), also rarely called Fireland in English, is an archipelago off the southernmost tip of the South American mainland, across the Strait of Magellan.

The archipelago consists of the main island, Isla Grande de Tierra del Fuego, with an area of 73,746 km (28,473 sq mi), along with numerous smaller islands, including Cape Horn and Diego Ramírez Islands. The western part of the Tierra del Fuego archipelago, about two-thirds including its many islands, is part of Chile, and the eastern part is part of Argentina. The southernmost extent of the archipelago, Cape Horn, lies just north of 56° south.

The Diego Ramírez Islands and Drake Passage National Park (formerly the Islas Diego Ramírez-Drake Passage Marine Park) is a national park of Chile established in 2018 as a marine park and redesignated as a national park in 2025. It lies south of the Tierra del Fuego archipelago, surrounding the Diego Ramírez Islands. Administratively, it belongs to Antártica Chilena Province in the Magallanes y la Antártica Chilena Region.

The park spans 14,439,060 ha and aims to conserve subantarctic oceanic ecosystems, pelagic bird habitat (including the wandering albatross Diomedea exulans and southern fulmar Fulmarus glacialoides), marine mammals, and distinctive geomorphological features such as shallow seamounts associated with the circulation of the Southern Ocean. It complements the Cape Horn Biosphere Reserve.

Hornos Island (Spanish: Isla Hornos) is a Chilean island at the southern tip of South America. The island is mostly known for being the location of Cape Horn. It is generally considered South America's southernmost island, but the Diego Ramírez Islands are farther south. The island is one of the Hermite Islands, part of the Tierra del Fuego archipelago.

The Chilean Navy maintains a station on the island, consisting of a residence, utility building, chapel, and lighthouse. A short distance from the main station is a memorial, including a large sculpture featuring the silhouette of an albatross, in honour of the sailors who died while attempting to "round the Horn".

Águila Islet (Spanish: Islote Águila, "Eagle Islet") is the southernmost point of the Americas. It is part of the larger southern group of the Diego Ramírez Islands, about 100 km (62 mi) southwest of Cape Horn in the Drake Passage.

The distance to the closest Antarctic lands (Greenwich Island, South Shetland Islands) is about 800 km (497 mi) and to the mainland (Antarctic Peninsula) is about 950 km (590 mi).