How much does entry to the Kamieńczyk Waterfall cost?

Wodospad Kamieńczyka (the Kamieńczyk Waterfall) has a separate fee that is not covered by the standard Karkonosze National Park (KPN) ticket: 16 PLN standard and 8 PLN reduced. The price includes a helmet, which is compulsory in the waterfall's gorge. Dogs are not allowed into the gorge.