The enormous cavern that shocked Garp was not actually Roy and the others' destination.
This massive place, filled with storage tanks, was actually the energy production site for the entire super algae cultivation factory, as well as the place where mature algae was processed.
Neptune led Roy and his group through the winding, scorching pipeline area, past countless workers, until they reached the end of the rock wall.
Before Roy and the others stood a rectangular steel gate more than ten meters tall.
"Lord Roy, Mr. Garp, the algae cultivation factory is behind this. Please follow me."
Standing before the gigantic steel gate, Roy and the others appeared exceedingly small.
After Neptune swiped his identification card across the platform before the giant gate—
"Thud, thud, thud~~~~~"
The sounds of machinery colliding began to ring out from within the gate as countless gears engaged, generating tremendous pulling force.
"Creeeak!!!"
A shining crack split open down the middle of the gate.
"Whoosh~~~~~"
Along with the light came a gust of air carrying the scent of aquatic plants.
"Th-this is..."
The gate rapidly swung outward under immense force.
What came into view next was a vast cavern coastline, at least twice as large as the cavern Roy and the others had just left behind.
Enormous algae cultivation factories rose one after another along the coast.
Under an unknown light source at the top of the cavern, the massive super algae cultivation factories looked exceptionally magnificent.
Different types of algae were divided into separate zones, and their cultivation factories differed from those outside in both structure and construction materials.
Every factory here was made of glass. Some contained enormous transparent cylindrical chambers dozens of meters high, connected one by one to tens of thousands of glass pipelines.
Transparent pipelines spread around every giant cylindrical