I grew up near this area over the state line in neighboring Joplin Missouri.
Back in the 70s and 80s piles of chat hundreds of feet tall could be seen for miles. Chat is the local term for the mining waste -- in this case mostly limestone that's been pulverized and the lead and zinc removed. But there are trace amounts of lead remaining. Most of the chat has since been removed and used as railroad ballast and road base.
As kids we used to play in these chat piles -- you could find all kinds of interesting minerals and occasionally fossils. Occasionally the ground would collapse around the flooded and abandoned mines.
I was just back to this area several months ago and me and some friends spent the day taking pictures around Picher, OK and nearby Route 66. Picher is essentially a ghost town nowadays, but interestingly you can still drive and walk around the area, even though it's an EPA superfund site.
BTW, there's a geek connection to Picher. One of the companies to survive the mining is Eagle-Picher; they were an early innovator in battery technology and became a major supplier of batteries in aerospace, including the batteries for the Apollo missions. In nearby Quapaw, OK that built a boron enrichment plant producing boron 10 isotopes for the nuclear industry, too.