Adventurers Cas and Jonesy, known for their daring exploits which include crossing the Tasman Sea and trekking Antarctica, are heading off on their next adventure, this time in Australia's Outback. What's more, they are looking for two Aussie travellers to join them on a Top End Time Out Challenge.

The Northern Territory's Top End, which encompasses Darwin, Kakadu, Arnhem Land and Katherine, offers the full scale of adventure from riding rough on a Kakadu four-wheel drive safari, lifting off on a scenic flight over the Northern Territory's most picturesque landscapes and witnessing sunsets over the Arnhem Land escarpment.

One lucky Aussie plus a friend can join Cas and Jonesy on their trip by jumping on the Australia's Outback Facebook page (Facebook.com/northernterritoryaustralia) building their ultimate Top End itinerary and describing it in three words for the chance to win their spot on the Top End Time Out Challenge.