MALLA DE PERFORACION DE MINERIA SUBTERRANEA Y CANTIDAD DE TALADROS DE UN...

MALLA DE PERFORACION DE MINERIA SUBTERRANEA Y CANTIDAD DE TALADROS DE UN...

Salt mine 1200 feet below Detroit?  What.

Detroit Salt Mine

The Giant Salt City Beneath Detroit - my boys went on a field trip down into the salt mines before they were closed.

excavabilidad-tuneles-mineria-subterranea.jpg (2592×1944)

excavabilidad-tuneles-mineria-subterranea.jpg (2592×1944)

speleominas: La mina subterranea "visitable" de la Escuela de Minas de Madrid. Mina Marcelo Jorissen

speleominas: La mina subterranea "visitable" de la Escuela de Minas de Madrid. Mina Marcelo Jorissen

Consolidated Gold Mind | Dahlonega, Georgia.   My daddy's brother Howard Brown worked here for years and years many years ago...

Georgia Geological Attractions and Destinations

Dahlonega in 1828 had a classic gold rush leading to prosperity, disruption and a U. The Consolidated (shown here) and Crisson mines keep history alive.

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Paths

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0x01000000C0E611696F0BC8C4EF289C8A0810A93F3E04940A2881796E (1200×800)

Mail Rail, London post office railway between Paddington and Whitechapel, abandoned since 2003.

Mail Rail: The Deserted Tunnels of London's Post Office Railway

The deserted London Post Office Railway aka Mail Rail opened in 1927 serving eight underground stations between Paddington and Whitechapel, closing in 2003

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