The Nutshell is a tiny pub with an outsized reputation, long billed as one of Britain's smallest. It is the kind of place where the novelty is obvious the second you step inside: there is not much room to hide, and that is the point.
Go for one drink rather than an evening, especially at busy times. The pub works as a quick, cheerful Bury St Edmunds ritual after the abbey or market, and its eccentric scale fits the town's fondness for small surprises.