Considered one of the steepest rail trips in the world, this short journey through the Ecuadorian Andes is a dramatic and treacherous one. Connecting Alausi and Sibambe, the train zig-zags up the mountain known as Nariz del Diablo, or the Devil's Nose.

Ascending nearly 2,000 feet (609m) in just seven miles (11km), from 5,905 feet (1,799m) to 7,545 feet (2,299m), the train is an engineering marvel. And while it's no longer possible to sit on the roof of the carriage like in the early 20th century, it's still an unsettling ride.

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24 scary yet scenic rail journeys you'll never forget