Ilha das Cobras, Naval facility island in Rio de Janeiro Bay, Brazil.
Ilha das Cobras is a Navy facility island in Rio de Janeiro Bay with multiple military structures and a deep-water port. The island contains various buildings and installations designed to support naval operations and ship movements.
Portuguese forces built fortifications around 1713 to defend Rio de Janeiro's harbor. It was later expanded into a major naval base and has served military purposes for centuries.
The Brazilian Navy uses this place for training programs and instruction centers where sailors develop their maritime skills. From outside, visitors can observe Navy operations, especially when ships arrive and depart from the harbor.
Access requires official authorization from the Brazilian Navy, with security checkpoints at all entry points. Regular visits are not available, but the island can be viewed from the water or a distance.
The island contains an underground tunnel system connecting different military installations, built in the early 1900s. This hidden network allowed safe movement between buildings without exposure to enemy fire.
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