, 
On the island is also an observation tower built by the military.
On 10 September 2000 the new observation tower was opened.
An observation tower stood on the high ground- such as it was- at the center of the island.
Until the end of the 1980s there was an observation tower on the mountain.
An observation tower on the American side offers a look from a higher perspective.
On the summit, there is an observation tower built in 1913.
David stood atop the observation tower again, watching the line.
There is also an observation tower looking out over the dunes.
There are two observation towers on the dam one at each side.
The square structure has four observation towers, one at each corner.
