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Postojna Cave in Slovenia is N° 1 of The World’s 100 Best Show Caves 2026
Postojna Cave in Postojna, Slovenia, is N° 1 of The World’s 100 Best Show Caves 2026, published by Worth a Journey. N° 2 is Cueva de Valporquero in Vegacervera, Spain, and N° 3 is Javoříčské jeskyně in Javoříčko, Czechia. The list names 100 show caves in 36 countries; the United States has the most entries, 15.
Source: The World’s 100 Best Show Caves 2026, Worth a Journey, https://worthajourney.com/show-caves/