Small grids of purple squares can be seen in some of the sidewalks downtown. These are skylights for an underground mall built in the city at least a hundred years ago. Throughout its history, this underground area has been host to a brothel, a Chinese laundromat, a saloon, a drugstore, at least three opium dens, and rooms used for smuggling alcohol during Prohibition. When fire destroyed Havre's business district in 1904, legitimate above-ground businesses joined the illicit businesses operating in the underground while the new brick buildings were built in the streets above. The underground area, now designated "Havre Beneath the Streets", currently operates as a tourist attraction.