Mramornica Cave near Brtonigla: a guided tour of the underground chamber
At Mramornica near Brtonigla, a guide leads you through a large underground chamber. Its prepared path passes reddish and white cave formations.
Steep steps lead into the cave, and the guided tour takes about half an hour. The visit covers a single chamber, with guides speaking Croatian, Italian, English or German. The temperature stays around 14 °C throughout the year.
The reddish and white formations occupy a chamber roughly one hundred metres long and fifty metres wide.
Travel writer Alberto Fortis visited Mramornica in 1770. He described his visit in a letter from 1771. Signatures left by earlier visitors remain on the cave walls, including an inscription dated 1775.
Visiting in November
In November 2026, visits to the cave are by prior arrangement only. Groups of at least 20 people must arrange their visit at least three days in advance. Admission costs €10 for adults, €7 for children and €8 for students and visitors aged 65 and over.
The cave is near Stancija Drušković, in the Brtonigla area, about 400 metres from Agroturizam Sterle. The map marks the Mramornica visitor site. Use the enquiry button to arrange a time for your visit.
Address: Štancija Drušković 20, 52474 Brtonigla