Image: Donegal, Knockalla Fort (geograph 1878468)
Description: Donegal: Knockalla Fort Knockalla Fort (elevation 24 metres, 80 feet) was built in 1810 by the British as a defence against possible French invasion of Ireland. The fort was one of six built on Lough Swilly and acted as the main headquarters. It comprises a Martello tower with walls 11 foot thick and faced with sandstone to minimise the effects of shrapnel on the men below during attack. Inside the fort there are two wells; one is located at the foot of the tower and the second, if the siege took a turn for the worse, inside the tower itself. The fort and surrounding grounds were sold in the 2000s for €740,000. Discovery Map Series 2: Map Ref. C27164 37134
Title: Donegal, Knockalla Fort (geograph 1878468)
Credit: https://www.geograph.org.uk/photo/1878468
Author: Michael Murtagh
Permission: Creative Commons Attribution Share-alike license 2.0
Usage Terms: Creative Commons Attribution-Share Alike 2.0
License: CC BY-SA 2.0
License Link: https://creativecommons.org/licenses/by-sa/2.0
Attribution Required?: Yes
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