Never heard of the London Stone? Shame on you. It may not have the powers of the Philosopher's Stone, but the London Stone has got a whole lot of history behind it. The stone is a chunk of oolitic limestone that's just over 40cm high and is thought to have Roman origins.
The name 'London Stone' dates back to 1100, but for the last few decades this ancient relic has been housed, somewhat bizarrely, in a branch of WHSmith on Cannon Street, hidden away behind the magazine racks. But now the Grade-II listed lump of stone could get the attention it deserves, as the building has been bought by developers Applegarth, who plan to turn the site into an office tower (because we haven't got enough of those). More excitingly, they're also planning to give the stone its very own public plinth in the middle of the City.
Interested in old London relics? Someone's launched a campaign to preserve a red phone box in Greenwich.