Grotta Gigante, Borgo Grotta Gigante

#1 of 124 in Outdoors in Friuli Venezia Giulia
Must see · Outdoor Activity
The largest naturally occurring cavern in Europe, Grotta Gigante was discovered in 1840 during a search for underground water sources for the town’s aqueduct. Take a tour, available in Italian or English, and head down the 500 steps, past ancient stalactites and stalagmites, stopping to take in the views. After the tour, visit the nearby museum of speleology to learn more about the formation of the caves and see some interesting geological and paleontological finds, as well as a poster collection depicting the cave. Quickly create a custom-made itinerary for Borgo Grotta Gigante using our trip planner.
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TripAdvisor traveler rating 4.5
1,045 reviews
  • About a 30 minute drive from Trieste is the Grotta Gigante. This is a truly unique, amazing, massive cave that photos don’t do justice to. Be aware that there are 500 steps down and then up. If one...  more »
  • Amazing size and interesting. One hour tour well paced so 500 steps down and back up comfortable. Guide speaks on Italian then plays English audio which was fine for us.  more »
  • Amazing! Very interesting also for children. We were there with our kids (2 and 5 year old). It was no problem to go through the stairs (500 steps under + 500 steps up), everything very sure. But it's very important to get warm dressed, because it's cold and wet!
  • The biggest cave hole in the world! No long corridors but just a path descending and ascending into the cave hole. The guide will first explain in Italian, followed by English. 500 steps each but easy to do even for kids as you can choose your own pace on the way back.
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