This particular tunnel is interesting because it shows the original foundations of Bloomingdale Insane Asylum, which was demolished in 1890 when Columbia moved in.
其中这条隧道尤其有趣。 它展现了布罗明达精神病院的原始地基。 1890年哥伦比亚大学搬进来的时候 精神病院就被拆除了。