The Heaven's Peak Fire Lookout in Glacier National Park is significant as one of a chain of manned fire lookout posts within the park. The one-story timber-construction structure with a flat roof was built in 1945. The flat overhanging roof is anchored to the stone foundation with cables.The lookout was to be built in 1940 by local contractor Ole Norden as part of a Public Works Administration project. 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?
A:
Building