Illimani, the 6438m giant overlooking La Paz, was first climbed in 1898 by a party led by WM Conway, a pioneer 19th-century alpinist. Although it’s not a difficult climb technically, the combination of altitude and ice conditions warrants serious consideration and caution.

Technical equipment is essential above the snow line; caution is especially needed on the exposed section immediately above Nido de Cóndores where several climbers have perished.