Equine surprise

For years I traveled everywhere in London using the London Underground. This meant that I ended up with a very disconnected mental map of the city. It was a bit like a video game world, where the parts you visit are mapped out in 3D, but the individual mapped areas are connected by doors that take you through empty unmapped space. Each time I accidentally ended up walking from one station to another I would connect two previously unconnected regions of knowledge, and the effect would be revelatory.