The Fatra-Tatra Area or the Tatra-Fatra Belt of core mountains is a part of the Inner Western Carpathians, a subprovince of the Western Carpathians. Most of the area lies in Slovakia with small parts reaching into Austria and Poland. The highest summit of the whole Carpathians, the Gerlachovský štít at 2,655 m (8,711 ft), lies in the High Tatras range which belongs to this area.

The Little Carpathians are a low mountain range, about 100 km long, and part of the Carpathian Mountains. The mountains are situated in Western Slovakia, covering the area from Bratislava to Nové Mesto nad Váhom, and northeastern Austria, where a very small part called Hundsheimer Berge is located south of the Devín Gate. The Little Carpathians are bordered by the Záhorie Lowland in the west and the Danubian Lowland in the east.