A massive fully enclosed circular u...

A massive fully enclosed circular underground Minecraft base beneath a modern quartz mansion. The structure is a complete 360-degree cylindrical base with thick outer walls and no open sides. It contains multiple stacked circular levels arranged around a central vertical glass elevator shaft. Each level is clean and empty, designed as structural platforms with smooth floors and open space for future building. No detailed interiors or decorations are included. The central core contains a glowing elevator shaft connecting all levels. At the bottom is a circular energy chamber with lava and water. The entire structure is symmetrical, minimal, and designed as a clean blueprint-style megabase ready for modular expansion.