BASE (Foundation) refers to a type of climbing that involves jumping or gliding from fixed objects, such as buildings, antennas, spans, and earth (hence the acronym). It is considered an extreme sport and is often associated with high-risk activities due to the potential for serious injury or death. BASE jumping requires specialized skills and equipment, including a parachute and safety gear. Participants typically seek out locations that offer suitable heights and conditions for jumping. The sport has gained popularity over the years, but it remains controversial due to safety concerns and legal restrictions in many areas.