The limestone mine Elon Musk says handles federal retirement papers is actually a real thing that does in fact function pretty much like Musk described it.

Discover the wonders of Ohio Caverns, "America's Most Colorful Caverns," and explore the underground beauty of stalactites, ...

Hard water gets into the water softener system from the main water supply. It ensures all water you use in the home gets proper treatment. Inside the device, there’s a tank full of tiny resin beads.