Ever since I was a kid I have loved exploring and have always had a fascination with going underground. As I got older I took that fascination and turned it into a profession. Now with connections from that profession I get to see areas that are closed to the general public. I just want to share some of the photos and learn about other places around the country that can be explored. WARNING: the topic of this thread contains DANGEROUS activities and should NOT be attempted by anyone without proper training or supervision. Enjoy. First we are going to start with the Caledonia Mine. This mine is an old copper mine with some very well preserved areas. Unfortunately we were constrained on time and only got about a half mile back into the mine. The Caledonia has a long history and is the combined work of 4 different mines (Nebraska, Kansas, Flintsteel, and Mass) that have been consolidated over the years. Currently the mine is privately owned and used to provide mineral specimens for sale across the world. You can also do a paid dig to find copper yourself although you don't get to go underground. The Caledonia uses a raised stope chute to keep the ore above the rail grade and allow easy loading of the tram. This eliminates the need for a scoop tram unless they are drifting. A nice 1% slope to the Adit and perfectly level rail gives a nice smooth ride on the tram. This mine was operational through the 1958 and this was the lunch room. The wall was damaged when a load of old explosives was detonated underground and produced a larger than expected blast. The lodes of Copper bearing rock are easily visible in the drift.