Ad Pirum

Claustra Alpium Iuliarum (Latin for 'Barrier of the Julian Alps'; hereby, the term Julian Alps refers to the wider mountainous and hilly region from the Julian Alps to the Kvarner Gulf) was a defense system within the Roman Empire between Italia and Pannonia that protected Italy from possible invasions from the East. It secured the Postojna Gate, the land link between the eastern and western part of the empire, and thus the Claustra represented an inner border defense of the empire. Unlike a linear rampart, the Claustra consisted of a series of interconnected fortifications with its center at Castra ad Fluvium Frigidum (in the area of today's town of Ajdovščina, the Vipava Valley); other important fortresses were Ad Pirum on today's Hrušica Plateau and Tarsatica, now a part of the city of Rijeka. They had been governed from the town of Aquileia.

Gorenje (pronounced [ɡɔˈɾeːnjɛ]; Italian: Goregna) is a village in the hills northwest of Postojna in the Inner Carniola region of Slovenia.

Vodice (pronounced [ʋɔˈdiːtsɛ]) is a small dispersed settlement in the hills east of Col in the Municipality of Ajdovščina in the Littoral region of Slovenia.

Bukovje (pronounced [ˈbuːkɔu̯jɛ]; German: Bukuje) is a village northwest of Postojna in the Inner Carniola region of Slovenia.

Carniola (Slovene: Kranjska; Slovene pronunciation: [ˈkɾàːnska], German: Krain; Italian: Carniola; Hungarian: Krajna) is a historical region that comprised parts of present-day Slovenia. Although as a whole it does not exist anymore, Slovenes living within the former borders of the region still tend to identify with its traditional parts Upper Carniola, Lower Carniola (with the sub-part of White Carniola), and to a lesser degree with Inner Carniola. In 1991, 47% of the population of Slovenia lived within the borders of the former Duchy of Carniola.

Javornik (pronounced [ˈjaːʋɔɾnik]) is a small dispersed settlement on the slopes of Javornik Hill south of Črni Vrh in the Municipality of Idrija in the traditional Inner Carniola region of Slovenia. Its remoteness and high elevation have resulted in people moving away from their farms, and there is only a single resident in the settlement.

Predjama Castle (Slovene: Predjamski grad or grad Predjama, German: Höhlenburg Lueg, Italian: Castel Lueghi) is a Renaissance castle built within a cave mouth in south-central Slovenia, in the historical region of Inner Carniola. It is located in the village of Predjama, approximately 11 kilometres from the town of Postojna and 9 kilometres from Postojna Cave.

Predjama (pronounced [pɾɛdˈjaːma]; German: Luegg, Italian: Castel Lueghi) is a small settlement in the Municipality of Postojna in the Inner Carniola region of Slovenia.

Novi Svet (pronounced [ˈnɔːʋi ˈsʋeːt], German: Neuwelt, Italian: Mondonovo) is a dispersed settlement in the hills west of Hotedršica in the Municipality of Logatec in the Inner Carniola region of Slovenia.

Belsko (pronounced [ˈbeːlskɔ]) is a village northwest of Postojna in the Inner Carniola region of Slovenia.