Between Split and Ploče the Adriatic Highway performs its finest act: the road squeezes between Biokovo’s limestone wall and the sea, threading the Cetina canyon at Omiš and the fifteen villages of the Makarska riviera, each with its own pebble cove beneath the mountain.
South of Split the D8 crosses the Cetina at Omiš, where the river exits a canyon of 200-metre walls on its last kilometre to the sea — one short detour takes you into the gorge itself. From Omiš to Makarska the road plays hide-and-seek with the shoreline through tunels and short climbs, with Biokovo’s barren summits (up to 1,762 m at Sveti Jure, reachable by a side road) towering over the ride. Past Makarska the riviera continues through Brela’s pine-fringed coves to Ploče at the Neretva delta, where the landscape suddenly opens into marshland and citrus groves.