The original post: /r/todayilearned by /u/patronsaintofweed on 2024-12-09 07:43:52.

Original Title: TIL Havre, MT burned down in 1904. The citizens moved into their basements and built tunnels between homes and businesses, until an entire city flourished underground, including a bordello, opium den, and ice cream shop. It was opened for tours in 1999.