Varna occupies an area of 205 km² on verdant terraces descending from the calcareous Frangen Plateau (height 356 m) along the horseshoe-shaped Varna Bay of the Black Sea, the elongated Lake Varna, and two waterways bridged by the Asparuhov most. It is the centre of a growing conurbation stretching along the seaboard to the north and south (mostly residential and recreational sprawl) and along the lake valley to the west (mostly transportation and industrial facilities).