I would like to point out that the Eastern Entrance stands in stark contrast to the Western Entrance. The Western Entrance is well manicured, gated, and locked off while the Eastern Entrance is a swampy trash heap that nature is slowly trying to reclaim. Despite their apparent differences they share a common trait: they are both inaccessible. One of the greatest things about the city that we live in is its rich history, and the tragedy of the Church Hill Tunnel collapse is a part of that history. I do not necessarily advocate for the removal of the train (which was actually proposed and explored in conjunction with The History Channel), but the current states of the existing sites does not seem wholly appropriate either.
Here is the historical marker near the west entrance of the tunnel:
Here is an 1883 map that shows the route of the tunnel underneath Church Hill: