Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Jackson Park was a station on the Jackson Park Branch of the Chicago "L". The station opened on May 12, 1893, and closed on March 4, 1982, when "L" service on the Jackson Park branch was suspended due to structural defects in the Dorchester bridge over the Illinois Central Railroad. The station was later demolished. The station was the terminal of the Jackson Park branch from October 31, 1893 until March 4, 1982.