Karabakh is a landlocked region located in the south of Armenia and the west of Azerbaijan. There is currently no official designation for what constitutes the whole of Karabakh. Historically, the maximum extent of what could be considered Karabakh was during the existence of the Karabakh Khanate in the 18th century, which extended from the Zangezur Mountains in the west, following eastwards along the Aras river to the point where it meets with the Kura river in the Kur-Araz Lowland. Following the Kura river north, it stretched as far as what is today the Mingachevir reservoir before turning back to the Zangezur Mountains through the Murov Mountains. However, when not referring to the territory covered by the Karabakh Khanate, the northern regions are often excluded (modern-day Goranboy and Yevlakh). During the Russian Empire, the eastern lowlands where the Kura and Aras rivers meet (mostly modern-day Imishli) were also excluded, but most pre-Elisabethpol maps include that region in Karabakh.