The Street Beneath My Feet

When you're walking along the city streets there's always so much to see and hear. But do you ever stop and look down? Have you ever wondered what's going on deep in the ground under your feet? What about in the countryside? What goes on underground there? Starting in the city, take a journey down though the layers of the Earth, all the way to the planet's core and out the other side. There are so many amazing sights to see along the way!