Final answer:
Christo and Jeanne-Claude built a half-mile-long pasture fence called Running Fence near Highway 101 in San Francisco.
Step-by-step explanation:
Running Fence, a half-mile-long pasture fence, was built by the artists Christo and Jeanne-Claude. It was installed near Highway 101, north of San Francisco, as one of their early massive projects. The fence required 2,050 steel poles holding nylon fabric and was installed and removed within two weeks. It also had passageways for cars, cattle, and wildlife.