nycsubway.org

GYv71 TIL someone secretly built a subway under Broadway, NYC
Zbnv TIL New York Subway trains have been running for 24 hours a day since it began operation in 1904
n91o TIL that due to a compressed air leak, a worker in a subway tunnel under New York City’s East River was blown out of the tunnel, through the mud at the bottom of the river, up through the water, and 25 feet or so into the air. He received no serious injury.