The newer tunnels were fitted with these fluorescent lights, although some skylights (block glass embedded in skywalks) let in some natural light during the day.
A staircase threads between the top floor and the sluices, which are in the middle of the dredge-mill.
Partier graffiti dates to when the caves were last open to the public; probably in the 1990s. This tunnel used to horseshoe between the brewery’s ice chute (left) and basement door (right, backfilled). Note the utility tunnel in the upper-right corner as well as the lighting brackets on the ceiling.
Even without the kettles the Hamm’s brewhouse is beautifully lit, ornamented architecturally and begging for photographers to remember it.
The largest room was the diesel laboratories, which tested various devices and fuel additives to make it safer to mine underground with diesel trucks and other machinery, such as at White Pine Mine, Michigan.
Presumably, in a nuclear blast the antenna would be blown flat and pop back up, allowing communication even after a near-direct hit.
A closeup of a high window in Bunge.
Frontenac’s shaft house is well preserved, compared to all other around it. Leica/Summilux 35/Ektar 100
Standing on the ruins of the burned Northern Pacific RR Freight House. It’s the best place to watch ships move around the harbor. Some things haven’t changed…