Mitt Romney's family settled in CAVE VALLEY, Mexico. It was named Cave Valley for a reason.

http://www.lascolonias.org/tag/cave-valley/

https://books.google.com/books?id=HWGtzTMvp4AC&pg=PA103&lpg=PA103&dq=cave+valley+mormon+mexico&source=bl&ots=q52pG9QhkR&sig=ACfU3U3gWzVfnMuXVfKRP4Qo3BwTvRoB4g&hl=en&sa=X&ved=2ahUKEwih1_jp14rmAhVNUK0KHQY4CfoQ6AEwD3oECAoQAQ#v=onepage&q=cave%20valley%20mormon%20mexico&f=false