The Earth is far more than just the surface we walk on; it's a complex system composed of various layers, each with unique characteristics. For those interested in uncovering the secrets that lie beneath our feet, geophysical surveys are indispensable. These surveys are crucial in various fields, ranging from natural resource exploration to environmental assessment and archaeology. But what exactly are geophysical surveys, and how do they function? Let's delve into the methods and applications of this fascinating domain.