Plane of Metal
Dissonant plane of chaotic decline
The Elemental Plane of Metal is a recently reopened elemental plane of elemental metal,1 located in the Inner Sphere between the Plane of Earth and Plane of Water.2
The Ringing City is the largest city on the Plane of Metal, and named for the cacophony of smiths' hammers. The city is built atop an adamantine deposit the size of a Golarian continent that itself is home to a city-sized network of mining tunnels.3
Paizo published a chapter about the Plane of Metal in Rage of Elements.