Huayna Picchu is the sharp peak behind Machu Picchu in every photograph, and the climb up it is the citadel’s most-wanted add-on. The summit sits at 2,720m (8,920ft) and the trail is a steep, exposed stone staircase cut into the face.

Entry is strictly capped at 400 permits a day across two time slots, so tickets vanish weeks ahead in high season. The ascent takes 45 to 90 minutes depending on pace; the Temple of the Moon detour on the far side adds another hour. Expect fixed cables on the steepest sections and a short tunnel near the top.

The payoff from the summit is a direct overhead of the Machu Picchu citadel with the Urubamba gorge wrapping behind it. Early slots catch the mist burning off.

Peruways books the combined Machu Picchu + Huayna Picchu permit, matches it to a train and shuttle, and arranges a guide if you want one. More at Peruways.