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Underground Places

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Mud flood at Kirby Cove
Mud flood at Kirby Cove		 Cavallo-tunnel.jpg
Cavallo-tunnel.jpg		 Mary Slater inside the channel
Mary Slater inside the channel		 Interior of sea cave, looking east from opening
Interior of sea cave, looking east from opening
1870s fortificaiton tunnel, Presidio of San Francisco. This chamber hadn't been opened for 70 years.
1870s fortificaiton tunnel, Presidio of San Francisco. This chamber hadn't been opened for 70 years.		 Ft Barry, Bonita Hill - Tunnel to fire control stations
Ft Barry, Bonita Hill - Tunnel to fire control stations		 Spelunkers inside Battery Townsley. NPS historian Steve Haller with jaunty eyepatch
Spelunkers inside Battery Townsley. NPS historian Steve Haller with jaunty eyepatch		 Marin Headlands air vents
Marin Headlands air vents
Btry Townsley antiaircraft gun shelter-entry
Btry Townsley antiaircraft gun shelter-entry		 Btry Townsley AA gun shelter interior
Btry Townsley AA gun shelter interior		 Btry Marcus Miller magazine doors
Btry Marcus Miller magazine doors		 Ft Scott - 1870s West Battery magazine
Ft Scott - 1870s West Battery magazine
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