Old mining town located in the desert of San Luis Potosi state in northeastern Mexico. The mining declined in early 20th century and it went from being one of the richest silver producers in Mexico to a ghost town by 1920.
Berlin is right smack in the middle of Nevada and is an odd combination of state park, ghost town, and some of the largest ichthyosaur fossils ever found. it's pretty remote, you will need to go over some dirt roads to get there, and if it's nearing winter, call ahead to make sure the roads are open.