The best and most famous example of Art Nouveau landscape-architecture has been designated a UNESO World Heritage Site.
Count Eusebi Guell, a wealthy businessman, conceived the project as infrastructure for a garden suburb on what Gaudi described as 'the treeless mountain'.
The only parts to be completed, before worked stopped in 1914 and it became a public park in 1922, were a grand entrance, two houses, 3km of paths, a marvellous terrace and the hippostyle hall, planned as an underground market.
Guell's friend, Antonio Gaudi, was the designer.