Our Pick
Posted on @rawstates
The Gadsden Purchase
1854
Southern Arizona
Public domain · Wikimedia Commons
The United States paid Mexico $10 million for 30,000 square miles, chiefly to get a flat southern route for a transcontinental railroad. It is the last major territorial acquisition in the contiguous states, and it left a border drawn straight across O'odham land that had been one community.
That was 1 of the hidden places.
Location: approximate area
This place has its own thread on r/rawstates
Read what people are saying about it, or add your own.