The Grafton Centre, Cambridge, UK
This was a successful mall / shopping centre in one of the UK's wealthiest and fastest growing cities, with a food court, eight screen cinema, two department stores, and around 50 other units It was opened in 1984, extended in 1995, and had a big £30m refurbishment eight years ago, it all feels almost brand new inside. But a rival development a ten minute walk away sent it in to decline. This probably wasn't what killed it though - with explosive growth in city property values the owners simply decided it was worth far more as a business and biotech and life sciences campus, than as a mall. It's still open, perfectly clean and air conditioned, and the car parks are in use as they serve the rest of the city centre - but all shops are closed apart from five right by the entrance, and work has started to convert it to science use, which will reuse about half of the structures including the main atrium, as well as adding a large hotel, multiple laboratory and office blocks, and some housing, to create open air squares in a small part that will be retained.