The bustling Spanish city of Barcelona attracts thousands of tourists each year and is renowned for its world heritage sites which include several masterpieces by the 19th century Catalan architect Antoni GaudÃ. In stark contrast to the city’s various attractions steeped in history, art and culture, Barcelona could host Europe’s first man-made island and "space hotel." Barcelona Island would feature a 984 ft high hotel which promises “the world's first zero-gravity spa” – whatever that means.