The Subterranean

"The Subterranean" refers to anything beneath the Earth's surface, such as caves, tunnels, or underground structures. It includes natural formations like caverns, as well as man-made features like subway systems, basements, or underground facilities. This realm is often accessed for exploration, utility, or habitation, and it plays a vital role in geology, engineering, and urban planning. Understanding the subterranean helps us appreciate the hidden environments beneath our feet and how they impact our ecosystems, infrastructure, and history.