Many people regard fossils, quite rightly, as rare and exotic objects. Yet how often do people come into contact with palaeontological remains without appreciating it? Probably the easiest example to cite is that of quarried stone, either appearing as facing stones or, in a less aesthetically pleasing setting, when ground down or crushed for concrete or road ballast. Often, quarried stone is utilised a large distance from its source. For example there are no exposures of Carboniferous Limestone in the Netherlands, yet this rock is common in Dutch towns and cities where it is found as facing and decorative stones, far from its origins in Belgium and elsewhere. Obviously such uses of rock are to be admired visually but not hammered; yet this is not necessarily always the case. In this article we introduce you to exotic blocks of Carboniferous Limestone which are so situated that they are actively worn down by the elements, exposing the treasures contained within.