Martello Towers Rest of World
It is reputed that Ireland had the first Martello Tower of the 19th century when they built a tower in 1804 on Whiddy Island in Bantry Bay on the south west coast of Ireland. The last tower was built in Australia in 1857.
You will still find Martello Towers throughout the world:
Map Showing the Location of Martello Towers in 2012