how do you suppose

bjn70

Flashlight Enthusiast
Joined
Nov 25, 2004
Messages
1,097
Location
DFW, TX
Probably something drilled into the rock. Unless it was built recently they probably drilled holes, stuck large steel rods in them, and filled them with a mixture that is similar to brick mortar, which anchors the steel rod into the hole. Then they build the lighthouse structure to connect to the steel rods.
 
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