Exterior detail at <a href="https://en.wikipedia.org/wiki/Crossness_Pumping_Station" class="extiw" title="en:Crossness Pumping Station">Crossness Pumping Station</a> in south-east London. This features the join between the Beam Engine House and the Boiler House, on the eastern side of the building.
<a href="https://en.wikipedia.org/wiki/User:Ethan_Doyle_White" class="extiw" title="en:User:Ethan Doyle White">Ethan Doyle White</a>
CC BY-SA 3.0
<span class="int-own-work" lang="">Own work by the original uploader</span>