Mines which can be visited underground

Silver. Valenciana Mine (Stairs) .
See En.Wikipedia.Org

Flint. (Vertical Ladder)

Coal. Big Pit (Original "Cage")

Lead/Silver. (Modern Elevator); Black Trout Adit (Sztolnia Czarnego Pstrąga) - Different Part Of The Site - Can Be Reached By Stairs And An Underground River By Boat

Salt. Wieliczka (Tourist Route - Normally Stairs In, Miners Route - Elevator) And Bochnia Mine (Cage)

Copper. Bartlomej Pit (Walk In/Out), Glanzenberg Mining Tunnel (Steps)

Silver. Cerro Rico (Walk In/Out)

Mercury ,Almaden (Elevator In, Railway Out); Idrija Part In Slovenia - Mercury Mine Accessible With Guide On Foot.

Coal. Blegny Mine (Cage)

Silver, Ryugenju Mabu Mine Shaft (Walk Along Old Tunnel)

Gold, Gallery Of Ortellan (Walk In Along Roman Tunnel)

Tin, "Poldark Mine" (Originally "Wheal Roots Mine" 18th C Workings Opened To The Public As A "Tourist Attraction")

Zink/Lead, Rammelsberg

Gold. Mina Do Chico Rey - Accessible On Foot, Walk In/Out.

Flint / Via A Spiral Staircase

Fertőrákosi Kőfejtő, A Limestone Mine
See Www.Fertorakosikofejto.Hu

Great Pit - Copper - Can Be Visited On A Guided Tour, Via Stairs Down (67m) And There's An Elevator Up
See Www.Falugruva.Se

Hřebečná Tin Mine (Via Stairs), And Possibly Others
See Www.Dulmauritius.Cz

Hallstatt Salt Mine: "Two Long Miners' Slides Take You Deep Underground To The Mystic Salt Lake. A Mine Train Returns You Safely And Comfortably Back Into The Daylight."
See Dachstein.Salzkammergut.At

Part Of Core Zone In Sawahlunto Town Is Museum Situs Lubang Tambang Mbah Suro. It Is Possible To Walk For Around 500 Meters Underground. There Are Plans To Extend That.

Olav's Mine
See Rorosmuseet.No

Llechwedd Slayte Caverns

At Rosia Montana Gold Mining Museum

"Thousands Of Years Of Occupation By Bats Who Deposited Guano In The Soil Of Mammoth Cave And Other Area Caves Made The Cave Dirt Rich With A Compound Called Calcium Nitrate. Calcium Nitrate Is A Mineral That Can Be Mixed With Other High Potassium Materials To Create Potassium Nitrate, Or Saltpetre, As It Is More Commonly Known. Saltpetre Is An Principal Ingredient In Black Gunpowder."
See Www.Nps.Gov

Sohdayu Tunnel Mine: A 30-Minute Tour Recreates The Mining Experience Of The Edo Period (1603-1867) With Dolls And Other Tools In The Remnants Of Hand-Dug Tunnels.