Combat Outpost Keating had been built at the bottom of three steep mountains, providing the enemy from day one with a tactical advantage.

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Like so many times before, Rob was up front -- leading a patrol of two dozen Afghans and Americans on a narrow trail along the valley floor, the steep mountains towering over them.

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But whereas the base in the Korangal was situated about halfway up a mountainside, in a former lumberyard, the one in Kamdesh would sit in a cup within the valley's deepest cleft, ringed by three steep mountains that formed part of the 500-mile-long Hindu Kush mountain range.

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During the last Ice Age, glaciers moving south carved deep gullies in reddish granite, creating a series of parallel steep-sided mountains interspersed with finger lakes as well as one fjord well, a fjard, actually.

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Peel off into the mountains for the steep and well-fortified ruins of Termessos, a city founded by indigenous Anatolians, or continue along the coast to the rocky, brilliant blue beach of Olympos, complete with its own ruins that date back to the Lycians.

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Cupped by steep khaki hills, with the great mountains beyond, it is a blossoming, privileged oasis.

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In June, 60 drivers took theirs through the Rocky Mountains, where they climbed and descended steep passes, suffering setbacks no more serious than the occasional overheated radiator.

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Mountains Fuya Fuya and Yanahurco de Mojanda offer steep but relatively easy, well-signalled hikes above 4, 000 metres.

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Anyone who has ever been to Rwanda can tell you that the hills here are no joke: every hairpin turn boasts views of mountains and more mountains, and even the urban neighborhoods are built on steep hillsides.

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