Vortex Type: Paranormal
The caves, which technically are mines because they are manmade, are carved out of sandstone and date back to the 1840s.
In the 1920s, the caves were used as a restaurant and nightclub venue known as the Wabasha Street Speakeasy. The Wabasha Caves were a haven for gangsters looking for a break from criminal activities. It is said to be one of the most haunted places in America.
Image by Jonathunder from Wikimedia Commons