Rare photos of strange rock salt mines located deep in the bottom of the lake

Located 600m above the ground, under Lake Erie in Ohio, USA, the Morton salt mine is considered a wonder of beauty as well as a strange way of exploitation.

Fairport Harbor Morton was officially exploited in 1959 in Fairport Harbor, Ohio.

The method of salt mining is quite strange, the ice-melting workers to get salt.

Road to salt mine.

Salt is transported from the ground to the top after being separated from the ice.

Salt glistened in the sun and it was said to be a wonder in Ohio.

The salt mines have in common are long, smoky tunnels and illuminated only by small lights on workers' ceilings and headlights.

To get down to the salt mine, the workers took 4 minutes to take the elevator.Workers must wear glasses and wear helmets, oxygen tanks and headlights.

Upon entering the mine, workers must go through a series of airtight chambers, which are responsible for regulating air pressure below the ground.Oxygen gas is pumped directly to all parts of the salt tunnel.

The process of rock salt mining uses mechanized completely, the huge cutting drills can cut the very hard rock wall.

After that, the workers drilled small holes in the salt wall putting explosives inside, breaking down the wall to collect from hundreds to thousands of tons of salt.

Ohio ranks fourth in domestic salt production and produces five million tons of rock salt a year.