Certainty.

They do say there are two things certain in life; death and taxes. I think the third certainty seems to be finding old disused gasometers wherever you go. This is a fine example of twins in my new home town of Eastbourne.

[Helen Jane]

fine complex structures as you show, and the added bird is a bonus.

[George]

@helenhall. Perhaps the bird reveals the 4th certainty - bird droppings on your car!

[Helen Jane]

@gaf005 never a truer word. you should try parking outside our house!