Not far from the city centre on the eastern shore of the Neris river, Labas Nuotykių Parkas offers over 1.5km of tracks up in the trees aimed at everyone from children to beginners to professional Tarzans. Each track comes with zip-lines for aerial flights, plus there's a 16m swing for the completely insane and an aerial runway across the river. The place is hidden from the road and there are no signposts at all. A map on their website partially solves the mystery.