Greben (mountain) in the context of "Vlaška planina"

Plana (Bulgarian: Плана) is a mountain range in western Bulgaria with an altitude of 1,337 meters above sea level. It is part of the Srednogorie mountain system that from west to east includes the mountain ranges of Greben, Zavalska Planina, Viskyar, Lyulin, Vitosha, Plana and Sredna Gora. Plana Peak in Tangra Mountains on Livingston Island, Antarctica is named after it.

Zavalska Planina (Bulgarian: Завалска планина) is a mountain range in Pernik Province, western Bulgaria, forming the westernmost part of the Zavalska–Plana chain of the Srednogorie mountain range system.

The mountain range spans in direction northwest–southeast for about 20 km; the width is 4 to 5 km. To the northeast the Yaroslavska Valley (964 m) connects it to the Viskyar mountain range and to the southeast a valley separates it from the Greben ridge of Viskyar. To the southwest the valley of the river Yablanitsa, a right tributary of the Erma, forms the boundary with the small mountain ranges Ezdimirska Planina and Strazha of the Kraishte region, while a 878 m saddle links it to Lyubash. To the northwest a 971 m saddle connects it to the mountain range of Greben.

Viskyar (Bulgarian: Вискяр) is a mountain range in western Bulgaria with an altitude of 1,136 meters above sea level. It is part of the Srednogorie mountain system that from west to east includes the mountain ranges of Greben, Zavalska Planina, Viskyar, Lyulin, Vitosha, Plana and Sredna Gora. Viskyar Ridge on Greenwich Island in the South Shetland Islands, Antarctica is named after it.

Lyulin (Bulgarian: Люлин) is a mountain range in western Bulgaria with an altitude of 1,256 meters above sea level. It is part of the Srednogorie mountain system that from west to east includes the mountain ranges of Greben, Zavalska Planina, Viskyar, Lyulin, Vitosha, Plana and Sredna Gora. Lyulin Peak on Livingston Island in the South Shetland Islands, Antarctica is named after it.

Burel Valley (Bulgarian: Бурелска котловина) is situated in western Bulgaria and is the first and westernmost of the chain of eleven Sub-Balkan valleys. The valley is enclosed between the western slopes of the Chepan division of the Balkan Mountains to the north, the small mountain ranges of Zavalska Planina and Viskyar to the south, and Greben to the west, already on the territory of Serbia. To the east the watershed between the rivers Gaberska and Slivnishka, as well as the Aldomirovtsi Heights form the boundary with the much larger Sofia Valley.

Burel Valley spans a territory of 172 km in Bulgaria. Its length from northwest to southeast is 15 km; the width varies between 7 and 10 km. The average altitude is 765 m; the highest point is mount Vidim (965 m).