Kányavár Island & the ‘Búbos vöcsök” (great crested grebe) nature trai. The Kányavár Island, part of the Balaton Uplands National Park is one of the most popular places on the Small Balaton area. The nature trail of the island named after the great crested grebe (Podiceps cristatus) is almost 2 km long and can be visited all year round. The 15 stops of the walking path display the bird life of the Lake Balaton Minor area. Each label shows a group of birds: waterfront birds, songbirds, birds of prey but the rat fauna and the water services of the area are also displayed. It takes about 1-1.5 hour to go along the whole path. Dogs are also allowed on leash only!