Porto is also radical. In the Vilar de Luz Airfield, in Maia, those more fearless can make a tandem jump at 12,000 feet altitude - from above the picture is unique and reaches the Francisco Sá Carneiro Airport, the coastal zone, the Dragon Stadium and the whole of the Invicta city. Too much? A helicopter ride through the skies of Porto is another possibility and takes visitors on a magical view of the city. In Matosinhos, looking to the Atlantic, a kart racer will raise the levels of adrenaline of motor racing fans. 'Accelerate' in a modern jet boat on the river Douro will increase the heart rate of those who have water as their favourite element. Canyoning, climbing, paintball, orienteering, trekking, mountain biking, hydrospeed, abseiling and slide are other activities that one can do in Porto.