Whatever your feelings about the commute, the London Underground is a fairly remarkable system.
When it was built it was the first underground railway in the world, and its iconic design features have endured.
But what we never realised - until the nice people over at Mental Floss pointed it out - is how idiosyncratic the tiling and designs on platforms can be.
Think about it: there's balloons at Finsbury Park:
The Chemist and the Mechanic/Flickr
Sherlock silhouettes at Baker Street:
Russell Square's got these chevron-style boyos:
Via Wikimedia Commons
Covent Garden is yellow:
and Arsenal might be alone in its purple tiling (if we're wrong, let us know in the comments).
It turns out, though, that there was a practical reason for subtly mixing up the designs and colour schemes at older stations.
When the Tube opened in 1863, it's possible not all of them were that well signed, so distinctive patterns and tiles would help commuters know they were at the right stop. But even more pressingly, it's likely a lot of early Tube riders would have been illiterate, rendering signs useless anyway.
As time went on, a lot of Tube station designers started to have fun with the pictograms. You'd probably realise you'd arrived at King's Cross:
But have you ever noticed the ton of bricks at Brixton...
And the maze at Warren Street?
Happy hunting; it should make your ride home a tiny bit more bearable.