Grotta Regina del Carso

Monte San Michele (Italian) or Debela griža (Slovene) is a hill on the Karst Plateau, in the Italian province of Gorizia, on the border between the municipalities of Sagrado and Savogna d'Isonzo. It is located eight kilometres southwest of Gorizia, on the left bank of the Isonzo, and has four peaks, the highest two of which (Cima Due and Cima Tre) have an elevation of 275 meters above sea level, while the lowest (Cima Uno) has an elevation of 237 meters, and Cima Quattro stands at 264 meters.Due to its commanding position over the lower Isonzo valley and the plain of Gorizia, it was the theatre of heavy fighting during the First World War; along with Sabotin and Podgora, the San Michele was one of the main bulwarks of the Austro-Hungarian defense of Gorizia during the early battles of the Isonzo, heavily fortified with multiple orders of trenches, barbed wire, heavy artillery, tunnels and machine-gun posts. It was one of the most bitterly contested heights on the Karst during the first six battles of the Isonzo; during the Second Battle of the Isonzo, in July 1915, it was twice captured by Italian troops, and twice recaptured by Austro-Hungarian counterattacks. Partial gains were made during the Third and Fourth Battle of the Isonzo. On 29 June 1916 the San Michele was the location of the first use of poison gas on the Italian Front, when the Austro-Hungarian released a mix of chlorine and phosgene which killed 2,700 Italian troops and poisoned another 4,000 (additionally, some 250 Austro-Hungarians were killed, and 1,500 poisoned, due to a change in the wind that blew some of the gas back towards the Austro-Hungarian lines). The San Michele was finally secured by the Italian XI Corps (General Giorgio Cigliana) in August 1916, during the Sixth Battle of the Isonzo.Poet Giuseppe Ungaretti fought on the San Michele, which he mentioned in some of the poems collected in Allegria di naufragi.In 1922 the San Michele was declared a "monumental area", and turned into an open-air museum. A World War I museum is located near Cima Tre.

The Vipava (in Slovene) or Vipacco (in Italian) or Wipbach / Wippach (in German) is a river that flows through western Slovenia and north-eastern Italy. The river is 49 kilometres (30 mi) in length, of which 45 km in Slovenia. After entering Italy it joins the Isonzo/Soča in the Municipality of Savogna d'Isonzo. This is a rare river with a delta source, formed by nine main springs. The Battle of the Frigidus was fought near the river, which was named Frigidus ('cold') by the Romans. It has a pluvial-nival regime in its upper course and a pluvial regime in its lower course.

Opatje Selo (pronounced [ɔˈpaːtjɛ ˈsɛːlɔ]; Slovene: Opatje selo, Italian: Opacchiasella) is a village in the Municipality of Miren-Kostanjevica in the Littoral region of Slovenia, right on the border with Italy. It is located on the Karst Plateau, along an old road leading from Komen to Gorizia. It includes the former hamlet of Mačeče.

Miren Castle (Slovene: Mirenski grad, also known as Grad 'castle' and Naša Gospa pod Krasom 'Our Lady beneath the Karst'; Italian: Grado di Merna or Castello di Merna) is an elevation above the settlement of Miren near Nova Gorica, in southwest Slovenia. The origin of the name, which came into usage in the 16th century, remains unexplained. No castle ever stood there. The hill is dominated by a collection of ecclesiastical buildings.

Lokvica (pronounced [ˈloːkʋitsa]) is a settlement in the Municipality of Miren-Kostanjevica in the Littoral region of Slovenia next to the border with Italy.

Nova Vas (pronounced [ˈnɔːʋa ˈʋaːs]; Slovene: Nova vas) is a small village in the Municipality of Miren-Kostanjevica in the Littoral region of Slovenia next to the border with Italy.The local church is dedicated to Saint Sylvester and belongs to the Parish of Opatje Selo.

Miren (pronounced [ˈmiːɾən]; Italian: Merna) is an urbanized settlement in the Municipality of Miren-Kostanjevica in the Littoral region of Slovenia right next to the border with Italy. The hill known as Miren Castle (Slovene: Mirenski grad) rises above the settlement to the south.

Orehovlje (pronounced [ɔˈɾeːxɔu̯ljɛ]; Italian: Raccogliano) is a settlement next to Miren in the Municipality of Miren-Kostanjevica in the Littoral region of Slovenia.The local church is dedicated to Saint Augustine and belongs to the Parish of Miren.Locals enjoy swimming at the local weir, tending to their gardens and farming.

The Second Battle of the Isonzo was fought between the armies of the Kingdom of Italy and of Austria-Hungary in the Italian Front in World War I, between 18 July and 3 August 1915.

Lake Doberdò (Italian: Lago di Doberdò, Slovene: Doberdobsko jezero) is the name of a sinkhole in the Province of Gorizia, Friuli-Venezia Giulia, Italy. It is located on the westernmost edge of the Karst (Italian: Carso, Slovene: Kras) plateau, close to the border with Slovenia. It is named after the village of Doberdò del Lago (Slovene: Doberdob).

Grotta dell'Artiglieria ("Artillery Cave") is a Karst cave in the municipality of Doberdò del Lago (Gorizia, Friuli-Venezia Giulia, Italy). The cave is located NE of Doberdob Lake, near the top of a small hill, in the small village of Jamiano. The name is referred to the artillery battery set in the cave during World War I.

Vrtoče (pronounced [ˈʋəɾtɔtʃɛ]) is a dispersed settlement south of Bilje in the Municipality of Miren-Kostanjevica in the Littoral region of Slovenia.