After more than 30 years of exploring by brave Slovene and Polish speleologists eventually in 2005 a connection was found between the upper BC4 cave system and the lower Mala Boka cave system with a difference of 1300 meters in altitude. This through the mountain journey is a challenge of endurance and skill reserved for trained speleologists. However if you would like to spend a day underground climbing rock, crawling, descending ropes and wading water, Opasen can guide you into the Mala Boka cave located near the Boka waterfall. When we run out of spirit or skill we rest for lunch then return the same way.
Total time from Bovec and back more than 4 hours.