uncharted

adjective

1. not shown or located on a map; unexplored; unknown, as a place or region: the uncharted depths of space.

adjective

1. (of a physical or nonphysical region or area) not yet mapped, surveyed, or investigateduncharted waters; the uncharted depths of the mind

adj.1847, from un- (1) “not” + past participle of chart.