Given the question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Mechanicville Hydroelectric Plant - Mechanicville Hydroelectric Plant is a 18.3-acre (7.4 ha) national historic district located at Mechanicville in Saratoga County New York. The listing included one contributing building and three contributing structures. The district dates to 1897 and includes notable Queen Anne architecture.The district includes the powerhouse an earth embankment a concrete non-overflow dam and a 700-foot-long concrete gravity overflow dam.
The answer is:
Building