Two minutes walk from the Monument to the Fallen on the Plaza Espana are steps to an underground museum - no entry fee - holding the ruins and remains of the San Cristobal Castle which was part of the defence against pirates and the British Royal Navy. I think the ruins of the castle were discovered when new water works were being excavated and much of the museum is a concrete tunnel with storyboards , with English translation.
The British tried on a number of occasions to capture Tenerife , without success - and the key of this exhibition is to see the cannon that shot off Horatio Nelson's arm - the tiger or El Tigre - in 1797.
I enjoyed the thirty minutes spent in the old sewers of Santa Cruz , losing count the number of times that I read , heard or saw the story of Nelson losing his arm. There is a short audio visual film in the bowels of the exhibition.
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