The significant geological feature of the San Andreas Fault is its role as a transform fault boundary between the Pacific Plate and the North American Plate. Located in California, USA, this fault is infamous for its potential to generate significant earthquakes. It stretches approximately 1,200 kilometers (750 miles) and is monitored closely by geologists due to its geological activity. The San Andreas Fault is a key factor in understanding tectonic movement and risk assessment for urban areas in close proximity to the fault line, making it crucial for seismic safety studies.