Trou de Fer ,Hell Bourg ,Reuion Island ,Indian Ocean

Address -: Trou de Fer ,Hell Bourg ,Foret de Belouve ,Reuion Island ,Indian Ocean

The Trou de Fer ("Iron Hole") is a canyon on Reunion Island, off the coast of Madagascar in the Indian Ocean. The primary river flowing through the gorge, which is up to 300 m (1,000 ft) deep, is the Bras de Caverne River, a tributary of the Rivière du Mât. The canyon has two distinct parts: a large crater, which is fed by six prominent waterfalls, and a narrow slot canyon at its outlet, which constitutes most of the canyon's length. The canyon starts at the waterfall of the Bras Mazerine stream and after some 1.4 - 1.8 km from the left side joins the main Bras de Caverne stream.The Bras de Caverne River enters the canyon with a waterfall about 200 m (660 ft) high. This drop is usually dry or has very little water, but between that and the next, 180-metre (590 ft) drop, springs feed the river, which drops over this then drops over a final 300-metre (1,000 ft) undercut cliff into the Trou de Fer in a narrow plume of water.

Directly to the left of this waterfall, another stream drops over the cliff, which is undercut to an extent that its lip has over 200 m (660 ft) of empty space between it and the canyon floor, of approximately the same height in two channels, and slams onto a ledge before emptying into the same pool as the Bras de Caverne waterfall. This waterfall is not as high, and has a smaller water flow. It is fed by several other falls streaming off the cliffs above it. Further to the left, at about twice the distance from the first falls to the second, another large stream plunges into the canyon.

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