Starigrad Fortress (Fortica) (Omiš)
Hiking to Fortica is not an easy hike, but very rewarding, as the view from above is absolutely stunning. Bee aware, you're hiking through rough nature, so seeing a snake once in a while is not uncommon.
It's the highest fortress in the area and over the years not alot of enemies could attack it. Once you're there you will understand why. The road is pretty challenging but you get to the top pretty fast. And by all means, you have got to go there. It has the most astonishing view i have ever seen.