Antarctica

The massive, hidden canyon was discovered in Antarctica.
"It’s up to us what path we go down. There’s a silver lining here.”
In 1986, Robert Swan made the longest unassisted walk ever to the South Pole. Three years later he went onto the North Pole and by the age of 33, he became first person in history to walk to both North and South Pole.
The president was vague about what the mission to Antarctica would entail, but he did indicate that it could take "up to four years."