Washington In The United States
Washington is home to the Seattle Underground, which has a similar background story to the Old Sacramento Underground we covered earlier. This underground was created when in 1889, a fire scorched through the city, leaving disaster in its wake. In the aftermath, officials decided that houses should be built with brick and stone and that the entire city should be elevated around 22 feet. In the years ahead, the old Seattle became something long forgotten to inhabitants, now only prominently remembered by historians and tourists alike.
Krakow In Poland
The Wieliczka salt mine is a popular spot for visitors of Krakow in Poland. Found in the South of the country, the mine is a staggering 9 levels deep and nearly 350 meters below ground. Originally used for salt mining in the 1200’s, it would eventually become an underground complex with residents. The city even featured a chapel, where believers could go worship. While mine production continued through the years, it was formally ceased in as recently as the 1990’s, now open for tours and mainly used as a historical landmark for the country.