This home's yard is practically an outdoor museum of mining memorabilia. Filled with relics from old mines, as well as a fascinating collection of colorful rocks and minerals, it can be viewed all year round. Be sure to look for the two-seater mine car for a smile! (It's currently in front of the house.)
Puzzle: According to the signs, what mine did the cars by the roadside come from? (one word)
Enter your answer at the following webpage:

You can validate your puzzle solution with certitude.
You do not need to enter the owner’s yard to answer the question (though if you are fortunate enough to meet the owner, he may show you around, like he did me!) There’s enough room on the roadside or in front of the house to pull your car out of traffic.
He moves the items around sometimes so if you cannot answer the question without entering the yard let me know.
The final cache is located near another Newton treasure. You can drive to it but the road is unpaved and bumpy and might be difficult when wet or in very high water years.
Congratulations to TireRubber, who explored Newton's treasures bright and early for the FTF!
This cache is part of the series, MountainHobbit's Mathoms, Year 11. Don't know what a mathom is? Check out Chapter 1 in the Fellowship of the Ring by J. R. R. Tolkien to find out the reason for this hobbity celebration!