Montenegro

Škurda is a submerged river originating from Lovćen and flowing into Kotor Bay. It begins 200m below the Krstac Pass, at the foot of Lovćen, and ends near the walls of Kotor Old Town, just below the old Austro-Hungarian dam

It is a prime spot for canyoning where you'll find waterfalls, swimming pools, rocks for climbing, and narrow, jagged crevices along the way. Multiple operators offer to pick you up in Kotor and guide you through the canyon with full equipment. Expect a 5-6h excursion!