A deserted and ruined region of the Klingon homeworld where Khan hides after his attack on Starfleet in Star Trek Into Darkness; in the prime timeline it is Martok's birthplace.
Ketha Province is a region of the Klingon homeworld. In the Kelvin timeline film Star Trek Into Darkness it is uninhabited, a landscape of derelict industrial buildings, and Khan uses a portable transwarp beaming device to escape there from San Francisco, knowing Starfleet cannot follow without risking war.
Kirk, Spock, Uhura and two security men fly down in a confiscated trading ship and are caught by a Klingon patrol. Uhura tries to bargain in Klingon, and Khan then kills the patrol almost alone before surrendering on learning how many torpedoes the Enterprise carries.
In the prime timeline the Deep Space Nine episode Once More Unto the Breach reveals that General Martok was born in the Ketha lowlands, to a family with no standing among the great houses.