Grmožur
| Grmožur | ||
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| Waters | Skadar lake | |
| Geographical location | 42 ° 14 ′ N , 19 ° 8 ′ E | |
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Grmožur ( Cyrillic Грможур ) is an island and castle ruins in Lake Skadar in Montenegro .
The fortress was built by the Turks , but a few years later it was conquered by the Montenegrins , who turned it into a prison . King Nikola I had political opponents - mainly non-swimmers - imprisoned here. This is why the island is also known by the locals as the Montenegrin Alkatraz .
The island is an important breeding site for native seabirds.