An underground laboratory is a research facility located below the Earth's surface, often designed to minimize interference from external factors such as radiation, noise, and temperature fluctuations. These labs are commonly used for scientific experiments in fields like particle physics, geology, and environmental science. The controlled environment allows researchers to conduct sensitive experiments that require isolation from the outside world. Many underground laboratories are situated in former mines or natural caves, providing a stable and secure environment. Notable examples include the Gran Sasso National Laboratory in Italy and the Soudan Underground Laboratory in the United States. These facilities play a crucial role in advancing our understanding of fundamental scientific questions.