Next we toured the Great Siege Tunnels (pic. 1). They were very interesting. Pic. 2 is of a traditional canon in the tunnel. They originally were dug in the late 1700s to try to get a cannon up on top of the hill. As they were digging they decided to open a hole in the side for ventilation. They realized that it was an excellent place to put a canon. They also used the openings to get rid of debris from the digging. A new canon type was invented to be able to point down (pic. 3). Pic 5 shows the interior of the tunnels.
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