The Vipava Valley (pronounced [ʋiˈpaːʋa]; Slovene: Vipavska dolina, German: Wippachtal, Italian: Valle del Vipacco) is a valley in the Slovenian Littoral, roughly between the village of Podnanos to the east and the border with Italy to the west. The main towns are Ajdovščina and Vipava.
Nova Gorica (pronounced [ˈnɔ̀ːʋa ɡɔˈɾìːtsa] ) is a town in western Slovenia, on the border with Italy. It is the seat of the Municipality of Nova Gorica. Nova Gorica is a planned town, built according to the principles of modernist architecture after 1947, when the Paris Peace Treaty established a new border between Yugoslavia and Italy, leaving nearby Gorizia outside the borders of Yugoslavia and thus cutting off the Soča Valley, the Vipava Valley, the Gorizia Hills and the northwestern Karst Plateau from their traditional regional urban centre. It is the European Capital of Culture in 2025. Since 1948, Nova Gorica has replaced Gorizia as the principal urban center of the Gorizia region (Slovene: Goriška), as the northern part of the Slovenian Littoral has been traditionally called. Since May 2011, Nova Gorica has been joined with Gorizia and Šempeter-Vrtojba in a common trans-border metropolitan zone, administered by a joint administration board.
The Karst Plateau or the Karst region (Slovene: Kras, Italian: Carso), also locally called Karst, is a karst plateau region extending across the border of southwestern Slovenia and northeastern Italy.
It lies between the Vipava Valley, the low hills surrounding the valley, the westernmost part of the Brkini Hills, northern Istria, and the Gulf of Trieste. The western edge of the plateau also marks the traditional ethnic border between Italians and Slovenes. The region gave its name to karst topography. For this reason, it is also referred to as the Classical Karst.