Flowing through the Pieniny, the Dunajec river forms a curving, rocky gorge of about 9 km. The gorge is surrounded by walls which are a couple of hundred metres long, and whose limestone cliffs blend beautifully with the forests that grow on them. The unique landscape of that area attracts crowds of tourists from all over the world each year, and rafting on the Dunajec is without a doubt the biggest tourist attraction in Poland. A Dunajec Rafting Trip starts at the marina in Sromowce-Kąty, is 18 km long and takes about 2-3 hours, depending on the water level. Rafting takes place on specially adapted, safe rafts made of five canoes. One raft takes 10-12 people at once and is run by two experienced rafters. The Polish-Slovak border runs along the most part of the Dunajec Rafting Trip route. Another attraction of the tour is a visit to Niedzica Castle, built in the 14th century by the Hungarians to protect an important trade route leading through the Dunajec Valley, and related to a remarkable story of the Incas who found refuge here.