From gentle hiking to mountain biking, climbing, and paragliding, all are available in the 160 square km (62 square miles) of Mt. Učka Nature Park, a series of peaks that help shelter the Liburnia Riviera (the official name for the stretch of coast centered on Opatija) and the islands from weather systems to the north. Hiking trails leading toward the summit of the Učka range start from all the resorts along the coast. A climb up to the fine stone lookout tower at the summit of the highest peak, Vojak (4,596 feet), can be well worth it, but it is not for the faint of heart nor inexperienced, out-of-shape hiking enthusiasts. On a clear day, the view offers a distant tour of the islands of Kvarner Bay, the Italian Alps, and perhaps even an indistinct view of Venice. Most routes up to the heights lead through the forest so that you can trek in summer without overheating. Along the way, you'll find natural springs to quench your thirst, ponds, tumbling waterfalls (in the wetter months), impressive natural stone columns, and several hundred caves. The local inhabitants include deer, wild boar, and bears in the park's northernmost sections. Humans have also been living in these hills for centuries, rearing cattle, farming, and working the forest; you'll come across numerous tiny villages and historical sites if you roam far enough. If you're running short on time, many mountain-biking tracks throughout the park offer the chance to expand your lungs on the way up and test your nerve rattling back down to the coast. There is also the possibility to drive to the top and take in the views from the stone tower. There is an information point with maps and souvenirs on the road leading to the summit called Poklon. At Poklon, hikers will find two great restaurants with accommodation and a mountain-hiking hut that sleeps 18. There's also a modern educational center.
