~ Beneath the Waves ~
Illustration I - Underwater Gate
...In the 60’s an underwater city was built. The only way to the city led through a underwater-gate located in the world’s deepest underwater hole…
Illustration II - Underwater City
.....Strangely enough, the city was built upside down. Nobody knows exactly why but it might have been so due to the water buoyancy. To protect it from predators some buildings and vehicles within the city resemble underwater plants and creatures.