Striking angular skyscraper in the new diagonal mar district beach and business the hilton diagonal mar barcelona makes the grade for business and leisure with ccib barcelona convention center next door and diagonal mar mall across the street youre a 5 minute walk from the beach and its an easy tram or metro ride to downtown barcelona short bus ride to sights once youve had your fill of shopping you can hop on the double decker city tour bus at nearby frum major sights like plaa cata