Whether you are climbing the park's highest peak, Veliki Risnjak, or looking to do some skiing on Snjenik, which is a moderate walk from the Platak ski resort, there is an abundance of activity in the karst-dominated landscape of Risnjak. Another memorable part of the park is the peak at Guslica. Located at an altitude of 1490 meters (4888 feet), there is an abandoned military complex formerly administrated by the Yugoslav People's Army at the top, an intriguing remnant of this country's brutal past. The river Kupa also originates here, a waterway that winds through the park and is considered excellent for whitewater rafting. For more information, consult the official park website.
Note:The park's main entrance is at Crni Lug, which is a short detour from the main route between Zagreb and Rijeka. There is a 4.5 km (2.8 mile) circular walking route that starts here and crosses some highlights of the karst landscape.