| 11. | It is still in use as an observation tower and radio mast.
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| 12. | The birds can be observed from an observation tower and a hide.
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| 13. | Observation towers could be constructed near the spots frequented by the elephants.
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| 14. | On the island is also an observation tower built by the military.
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| 15. | An observation tower and a mountain restaurant are located on its summit.
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| 16. | The first idea for building this observation tower emerged in November 1894.
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| 17. | The Central Observation Tower is located some distance behind the Gate House.
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| 18. | Riding the elevator to the top of every observation tower I saw.
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| 19. | An even better view is afforded from the observation tower at its summit.
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| 20. | An observation tower that preservationists say desecrated the battlefield of Gettysburg is demolished.
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