Model of the Quincy Mine, in Hancock, Michigan. One of the most prolific copper mines in its day, the Quincy mine also housed the world's longest mine shaft (1.75 miles on a 55 degree incline) by the time it ceased copper production in 1945. During WWII, it was responsible for roughly 25% of the nation's copper.
Want to learn more?
https://en.wikipedia.org/wiki/Quincy_Mine
http://www.geo.mtu.edu/KeweenawGeoheritage/BlackLavas/Quincy.html
Better still, take a tour:
Printer:
Monoprice Select Mini
Rafts:
No
Supports:
No
Notes:
Can be printed with or without supports or raft/brim.
Finishing touches
Can be files/painted to better represent how the mine looks today, but looks pretty cool printed in silver, gray, transparent, or glow-in-the-dark filament. The Quincy mine is often lit at night, making the use of GID filament a nice touch.
Given the limitations of Tinkercad, this model took a lot of trial-and-error, and was designed from various photographs taken at different angles, then scaled to fit the smaller bed of the Monoprice Select Mini.
