Now for a very different kind of underground - the LONDON UNDERGROUND.

Interesting fact:

The tube isn’t just home to endless streams of vacant, smartphone-staring zombies living a half-life beneath the earth - there are ghosts here too! Bethnal Green station has a particularly dark past, having seen a stampede in the wake of German bombs falling and leading to the deaths of 173 people. Some say you can still hear their screams today, though it might just be party-people taking advantage of the all-new 24-hour tube.