When General Scott undertook this campaign Florida was a terra incognita.
Into what remote corners or into what terra incognita might she not wander!
At the time the Yellowstone Park was set aside, the country was almost a terra incognita; its boundaries were ill defined.
One can only speak vaguely of detail, as this is still a terra incognita.
It was on the borders of that terra incognita which so often supplies eponymi to unknown and mysterious generations.
There is the same fear of the terra incognita in literature that there is in nature.
The country is little better than a terra incognita, to naturalists, geologists, and all other branches of ists and ologists.
"This joker should come from some terra incognita;" he said.
It was terra incognita to me; I had never entered these rooms before.
This wadi, it will be remembered, was to us terra incognita.