If you have watched the Teenage Mutant Ninja Turtles show you are probably informed about their place of living, the underground. They do live in really huge underground pipes and tunnels where they have found comfortable places for creating a base in there. If you thought that this can only be seen in animated movies, then, you should think again when you see this.Here you can see a huge complex of underground pipes and tunnels which have been designed to house hundreds of Japanese battleships and submarines. The main purpose of this huge dock was to keep the military ships protected from nuclear attack, deep underground.
The construction of this complex has begun in 1952 on the island of Honshu. Those tunnels were mostly built by specially designed robots who were capable to dig them easily.Unfortunately, this place is abandoned today because it was damaged during an underground earthquake.