I got these from the Shard in London yesterday. The Shard is the UK's tallest building, 1,016 feet high.
The coin showing 'Romeo the Fox' refers to a fox that somehow made its way up to the 72nd floor while the building was under construction. Named 'Romeo' by the construction workers, who fed it scraps of food, it was eventually rescued by an animal charity and released back into the wild!
You don't need to go up to the top of the building to get these coins - the machine is in the basement gift shop! The machine is pre-loaded with polished British pennies, so you can't choose your own penny to smash!