Synonyms:
chartless, uncharted, unmapped
Meaning: (of unknown regions) not yet surveyed or investigated; "uncharted seas"
Usage examples
We were in the Uncharted Forest.
The ship struck on an uncharted rock.
We had not thought of coming here, but our legs had carried our wisdom, and our legs had brought us to the Uncharted Forest against our will.
Nor has the strain died out, as is demonstrated in the present generation by many of Dr. Grenfell's cousins, among them General Francis Wallace Grenfell, Lord Kilvey, and by Dr. Grenfell himself on the Labrador in the fight against disease and disaster and distress along a stormy and uncharted coast.