Editor’s Note: This CNN series is, or was, sponsored by the country it highlights. CNN retains full editorial control over subject matter, reporting and frequency of the articles and videos within the sponsorship, in compliance with our policy . Budapest CNN  —  Commanding a prime view of the River Danube, Hotel Gellért has long been a beacon of architectural splendor and pride in Budapest. Since its grand debut in 1918, this Art Nouveau landmark has hosted royals, artists and dignitaries,