 During its course the Blue Trail visits arguably the most beautiful natural and man-made sights of Hungary, e.g.more than a dozen forts and castles, lookout towers, three World Heritage Sites of Hungary (the panorama of Budapest from the hills, the old village of Hollókő and the Stalactite Cave of Aggtelek), Lake Balaton, the Danube Bend, and the spent volcanoes of the Basin of Tapolca, etc.According to the latest GPS survey conducted in 2007, its total length was measured to be 1128.2 km and the total elevation change (climb) was found to be 30,213 metres in a Western-Eastern direction over the whole route.