Please answer the following question: Bristol Wells also known as National City Bristol City and Tempest is a ghost town in Lincoln County Nevada. The mining town was located on the west side of Bristol Mountain 14 miles (23 km) northwest of Pioche Nevada.The first mining claims were staked in 1870. The district was organized the next year when the settlement of National City grew around the National Mine. In 1872 a furnace was built to treat silver-lead ore from the Bristol Mine 4 miles (6.4 km) to the east. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Answer:
Building