Krčingrad

Krčingrad is a ruined medieval hillfort inside Plitvice Lakes National Park, tucked away on a narrow peninsula between Lake Kozjak and Gradinsko Lake. It is one of the most thoroughly excavated archaeological sites in the entire park, yet it remains a spot that most visitors to Plitvice never even hear about.

Who built this fortress?

Krčingrad was raised at the turn of the 13th and 14th centuries by the Babonić family, one of the most powerful noble houses in late-medieval Slavonia. The fortress guarded a trade route that ran through the Plitvice area, and whoever controlled that route controlled real income and influence. Written sources point to the Babonić counts building it specifically to protect the entrance to their political and economic territory. The stronghold's life was short: political shifts in the kingdom at the start of the 14th century stripped it of its strategic value, and it was abandoned and left to decay.

What will you actually see?

Surviving remains include sections of the outer defensive wall, built from local travertine, and two towers. A small rectangular tower stands alongside a much larger triangular one that dominates the southern side of the site — an equilateral triangle with 16-metre sides that once guarded the only land approach to the fortress. That triangular design is unusual for medieval military architecture in Europe, which is part of why archaeologists have paid so much attention to it. Over the following centuries, stone from the walls was quarried away for 19th- and 20th-century military and civilian buildings nearby, so what remains today is fragmentary but still clearly readable on the ground.

How do you get there?

Krčingrad sits right at the heart of the national park, along the route connecting the Kozjak and Gradinsko lake areas — in fact, Gradinsko Lake takes its own name from this hillfort (gradina means "hillfort" in Croatian). The site is reached on foot via the park's network of marked trails and boardwalks; because the exact walking routes are adjusted seasonally, it's worth checking the current layout at an information point near the park entrances before setting off.

When should you visit?

Plitvice Lakes National Park is striking in every season, but summer brings the heaviest crowds. Spring and early autumn keep the lakes just as colourful while the paths are far quieter, making it a better time to slow down and track down lesser-known corners of the park like the Krčingrad ruins.

What have archaeologists found?

The first excavations took place in 1911–1912 under historian Emil Laszowsky, who uncovered the outer defensive walls and both towers. The triangular tower itself wasn't fully excavated until much later, during research seasons in 2008, 2009, 2013 and 2014 carried out by the Croatian Conservation Institute. Work at the site resumed again in 2019, continuing a line of investigation that now spans more than a century.

Frequently asked questions

Who were the Babonići? They were one of the most powerful noble families in medieval Slavonia, and they built Krčingrad to control a local trade route and defend their territory.

Why was the fortress abandoned? Political changes in the kingdom at the start of the 14th century removed its strategic purpose, and it was left to fall into ruin.

Why is the neighbouring lake called Gradinsko? Gradinsko Lake is named directly after the Krčingrad hillfort (gradina) that sits on the peninsula beside it.

Can visitors explore the ruins on their own? Yes — the site lies within the national park and is reachable on foot as part of a Plitvice visit, though it's worth confirming the current trail layout at an information point first.