How small are the shafts.. I get real nervous in tight places
95% of the tour is on the actual working mineshafts, which meant that they were at least big enough for a small rail cart to ride on rail tracks filled with rock that the miners dug out. Plus there had to be room for miners to walk in and out and pass each other along the way, carrying their tools.
So the shafts are plenty big, like 7 feet tall and 7 to 12 feet wide. But plenty tall. Six to 18 feet.
There are some areas that they blasted out of the rock just for people to walk on foot without carrying equipment and without having any vehicle to haul debris.
Those sections are very few and short distsnce, but they're about 2 feet wide.