Looking into the Argo Tunnel at its Idaho Springs portal. I was hoping to see tracks and a steel door, but found a busy crew of environmental workers installing a pipe between the bulkhead and new water plant.
The house across from the Harris offices were decorated in a unique way.
“Ballistite is a smokeless propellant made from two high explosives, nitrocellulose and nitroglycerine. It was developed and patented by Alfred Nobel in the late 19th century.” -Wikipedia.
A social club/restaurant that was likely the place to be late at night.
Standing on the fence barricade that used to keep squatters out of the tunnel, the size of the space is impressive. What you see here is the current length of the tunnel; I set up a flashlight at the end to illuminate the concrete wall that is the lower portal.
A ruined culvert near Oregon Creek, behind Old Main, the predecessor of the University of Minnesota-Duluth.
The Calumet Elevator offices used to be flanked on both sides by rails. Now, only one side has engines running on it.
One thing that made the Eagle Mine unique is the underground mill, left of this picture. As the rocks moved down the mill, they would be turned into finer and finer powder.
Superior Street, as seen from the roof of the Temple Opera Block. Below is one of the sealed sidewalk elevator hatches.