Ava near the Memorial Building. The block glass embedded in the sidewalk here is actually a skylight for the tunnel below, which connects the Memorial Building to the steam and supply systems of the hospital.
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 long tunnel stretches toward the Mississippi. Was this the route Model Ts took on their way to waiting barges?
Bricks from the demolished buildings.
This heavy door opens directly into the missile vault and was used to load and unload the missile erector.
Rocket propellant and coolant were stored underground adjacent to the missile silo. This is the hallway that connects the missile area to the propellant area. Walking in this area was nice because the floor was dry.
A typical summer storm on Lake Superior.
Taken from under the headframe.
Holes were cut into the floor to extract equipment from the basements. it was interesting to see the I-beams extending through all the levels of Studebaker.