I can most highly recommend a visit to the National Fruit Collection at Brogdale near Faversham in Kent. Last year I made the journey and it was well worth it. Above pictured is a 'Medlar' which is a lesser known fruit related to a rosehip. This fruit is left to ripen over winter till really soft and ripe, almost rotten. This process is known as 'bletting'. The medlar has a lovely sweet nutty flavour. Incidentally, the French translation for medlar is 'un bout de chien' - literally 'dogs bottom' - you can see why!