Above London Euston station there’s a secret zoo.  Admission is free, you can buy a cup of tea, and from a safe balcony, you can watch thousands of wild animals roaming freely.

They’re mostly well trained, and after congregating in the central area, they file off into different directions after the zookeepers call out things like “The next train for Watford Junction will leave from platform 16”.  The really strange animals make a move when the zookeeper calls out “The next train for Liverpool Lime Street will leave from platform 10”.