Canyoning on Cetina river.
From my 13 Fantastic Split Day Tour Ideas article:
Booking some Split day tours during your Croatia vacation is an excellent opportunity to visit nearby landmarks. Your day tour choice can be active outdoor experience or scenic drive along the coast, checking out a few nearby islands on a speedboat, or hiking in the mountains. There’s plenty of things to keep your occupied. I’ll give you some of my favorite trip... Read more »