The Cockburn Channel leads from the Pacific Ocean to the Beagle Channel which in turn continues on to the Atlantic. To the north of the Beagle Channel is Tierra del Fuego Island, shared by Argentina and Chile
. The two countries share the Beagle Channel as well, with the border between them running down the middle of the channel for much of its length. The channel is named after Charles Darwin's ship, the HMS Beagle, and it was here that the naturalist saw his first glacier in 1833, and recorded in his notebook, "It is scarcely possible to imagine anything more beautiful."