Michigan Central Station in Detroit, U.S.A. - it replaced the original depot in downtown Detroit, which was shuttered after a major fire on December 26, 1913, forcing the still unfinished station into early service.
Source: Reddit
This rail station was built in 1913 but before its completion, it was put into use. At the beginning of World War I, there were more than 200 trains leaving the station each day. By World War II, it was used mostly by military troops and then eventually decreased significantly as people began using automobiles more and more. In 1988, it closed completely and since that time, many discussions have transpired between the owners and city officials trying to make a decision on how to best utilize the building. After making some renovations by the owners, eventually, Ford Motor Company took ownership of it in 2018 with big plans for using the building, which includes its autonomous vehicle development.