Read More here: https://soranews24.com/2018/11/16/abandoned-subway-station-in-tokyo-open-to-the-public-for-a-limited-time/
Between Ueno Station and Nippori Station on the Yamanote Line, there used to be a subway station on the Keisei Main Line named Hakubutsukan-Doubutsuen Station (try saying that five times fast). Located about 900 meters (0.5 miles) north of Ueno Station on the edge of Ueno Park, within a short distance of Ueno Zoo and the area’s many museums and art galleries, the station stopped operating in 1997 and was officially closed in April 2004.
It’s been over 21 years since it was open. However, this building will be open to the public for viewing from November 23, 2018 to February 24, 2019. You can check it out between 11:00 a.m.-4:00 p.m. on Fridays, Saturdays, and Sundays. The best part: it’s free!