Fodor's Expert Review Biokovo Nature Park

Behind Makarska, a large area of the rocky heights that form the majestic Mt. Biokovo has been designated as a nature park. Part of the Dinaric Alps, which run from Slovenia down to Montenegro, Biokovo abounds in rare indigenous plant species, and the mountain is primarily limestone with little green coverage. It's possible to reach the highest peak, Sveti Jure (1,762 meters, or 5,781 feet) in 5½ hours from Makarska. However, this is a strenuous hike, especially in summer, for which you will need good boots and plenty of water. Hiking the mountain on your own is not recommended; group excursions are a safer choice. The park has a few information centers, with one in Markarska (Franjevački Put 2A, generally closed October–April). Park entry includes the Skywalk, a glass-bottom walkway off the main road, which extends out from a cliff face.  You must buy admission tickets in advance on the website, though you can't purchase them more than five days before your visit. Don't wait until the last minute, as slots sell out.