Arheološko najdišče Debela griža, Archaeological site in Komen Municipality, Slovenia

Debela griža is a lowland fortified settlement from the Bronze and Iron Ages on the northwestern edge of Volčji Grad. Its dry-stone rampart held at least 60,000 cubic metres of stone, laid as a single wall and doubled at three entrances, with an outer circuit of about 850 m and an inner one of about 680 m. The ruins are 8 to 15 m wide and 2 to 4 m high, and the builders used surrounding sinkholes to make the walls look taller.

The fortified settlement probably arose in the 8th century BCE, during the Bronze and Iron Age, on the northwestern edge of Volčji Grad. Its walls held at least 60,000 cubic metres of stone and it was the centre of the surrounding hillforts. Roman sources name the Histri, a people of Illyrian origin, as inhabitants.

The site shows how early communities in this region built with stone and defended their homes on hilltops. The remains reveal the building skills these people possessed and how they adapted to the limestone landscape around them.

The site is open year-round and visitors can walk among the ruins to explore the remains and enjoy views across the limestone landscape. Its location near other historical places and accommodations in the region makes it convenient for a day visit.

The walls are part of a larger chain of hillforts that stretched across the Karst region and reveal contact between different ancient cultures. This strategic location allowed residents to observe and control movement across the landscape.