The phrase "a vast wilderness" is correct and usable in written English.
It can be used to describe a large, uninhabited, and natural area, often in the context of nature, exploration, or adventure.
Example: "The explorers ventured deep into a vast wilderness, where few had dared to tread before."
Alternatives: "an expansive wild" or "a great untamed land."
The Yukon, in Canada's northwest, is a vast wilderness.
There's a vast wilderness area — the Appalachian Trail, the Presidential Mountain Range, Mount Washington.
It was a small cluster of colonies caught between a great ocean and a vast wilderness.
Southern Balochistan is a vast wilderness of mountain ranges, of which the Central Brahui Range is the backbone.
Some parts of Iceland are well-trodden, but the east remains a vast wilderness of ice and fire.
Early on, faced with a vast wilderness, Americans were determined to tame the land, to make it predictable.
Central to Canadian identity is a national consciousness of inhabiting a country of vast wilderness landscapes.
However, after passing the first couple of miles, the crowds begin to dissipate and you will find yourself quickly immersed in a sea of vast wilderness.
But I've always been taken by the image of a tiny band of settlers in the vast wilderness of an unknown world at the very dawn of recorded history, 4000 B.C. On a riverbank they build their first huts and begin to discover what separates men from beasts: pottery, writing, mining, the wheel.
In the vast wilderness, there is a need for direction, a map, even just a sign.
It was an ardor for Alaska's vast wilderness -- its craggy peaks, blue coastal ice sheets and rolling tundra, and its caribou herds, musk oxen, wolf packs, moose and millions of migratory birds -- and a longing to tap into the oil and gas riches below the surface that propelled Mr. Hickel's contradictory and sometimes quixotic quests.
