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A tunnel runs north-south in the belly of Gellért Hill. The crew of Láthatlatn Budapest was given an exclusive opportunity to present the old, built in 1902, then II. Kelenhegyi pool was also almost destroyed during World War II. Everything that is hidden inside the mountain beyond the József Gruber water reservoir. Related article: http://valasz.hu/itthon/bemutatjuk-a-... Prepared by: Barna Borbás, László Réti Cinematographer: Máté Babay