Siberia and other Wilderness Adventures" FLY-WALK-JET BOAT in the World Heritage listed Mt Aspiring National Park. Wilkin River Jets and Backcountry Helicopters offer wilderness adventure and discovery within the beautiful Makarora region. Eco-tourism packages incorporate a thrilling helicopter ride over the Southern Alps, trekking Mt Aspiring National Park and an exhilarating jet boat ride. Est 1962 -Legends!