When in Potosi you must visit the mines unless you are afraid of heights or small tight places. Guides are easy to find. Before visiting the mines we went to the market and bought dynamite, blasting caps, and other explosives as well as coca leaves as gifts for the miners.
The mines consist of small shafts going as deep as 6 layers. When the miners saw us they held out bags hanging from their waists like trick or treaters on Halloween. They were dirty and sweaty but grinned widely at the sight of the coca leaves. They have used coca for centuries to numb their senses so they can continue to work in these conditions. There is no ventilation and the only light comes from gas lanterns. Make sure you visit the diety in the underground museum.
Quick Tips:
Choose your guide carefully. Most do not speak fluent English. We used a guide from our hotel; he was pleasant, but we didn't go to the very bottom layers of the mines. I didn't realize this until it was too late to go back. We bought dynamite and coca leaves, but the miners seemed much more interested in the coca leaves.
Best Way To Get Around:
Potosi is a compact town with most things in walking distance from the center of town. A bus or taxi is necessary to go to the mines.