The cave was discovered by accident in 1930 during the clearing of agricultural land.
The name Kingdom of Feštini was inspired by the complex, crown-like formations of its stalactites.
The cave contains rare 'curtain' formations and helictites that grow in irregular directions due to airflow patterns.
The underground lake is fed by natural groundwater percolation through the limestone bedrock.
The site operates as a private family-run attraction dedicated to geological education and agritourism.
Feštinsko kraljevstvo, known as the Kingdom of Feštini, is a karst cave system located in central Istria near the village of Feštini. The site features a developed walking path through subterranean halls filled with stalactites, stalagmites, and helictites. A small underground lake is situated at the lowest point of the accessible cavern. The surrounding property includes a mini farm with domesticated animals and a playground area. The cave maintains a constant internal temperature throughout the year. It is one of the few limestone caves in the region accessible to non-professional explorers via safe, lighted walkways.
The main cavern hall where the largest stalactites create a mirror reflection in the pool of the underground lake.
Bring a light jacket as the temperature inside the cave remains significantly cooler than the surface, even in summer.
Wear closed-toe, non-slip footwear to navigate the moisture on the limestone pathways safely.
Combine the cave tour with a picnic on the surrounding grounds to make the most of the mini farm and amenities.
Attempting to explore beyond the guided lighting system, as the limestone paths can be slippery and cave passages are uneven.
Open seasonally from spring through late autumn; closed during the winter months.
Do not touch the cave formations, as skin oils can permanently stop their growth; stay strictly on the designated paths.
