A sentence using 'unexplored' would be:
Long ago Michigan was unexplored.
Mary's attic is so full of things that it has remained unexplored for many years.
If unexplored land was explored then it would no longer be unexplored land, and that is why it is impossible to explore unexplored land.
Unexplored is an adjective.
An unexplored area inhabited by one's enemy may be called hostile territory.
because they didn't not that there were some area that wre unexplored.
The only area that was still unexplored in 1828 was Patagonia
A person who discovers a way to an unexplored area is a Pathfinder.
unexplored.
We have discovered a historical map which apparently seems to show an unexplored island in the Pacific Ocean.The historical map is of extreme importance to cartographers and historians of today.
Mary's attic
impossible, mysterious, unaccomplished
On medieval maps, unexplored land was generally labeled, Terra Incognita, meaning unknown land.
The criminal admitted to some crimes that he had previously denied committing. The details of the merger had not been previously revealed. The geology students were examining some previously unexplored caves in Turkey.