Among the pieces of Machu Picchu that still work five centuries after they were built, the stone staircases are the most ordinary and the most impressive. Cut from the ridge itself and set without mortar, they thread between the temples, terraces and residential blocks of the UNESCO site, carrying the same foot traffic they always did.

They had two jobs. Practically, they moved water-bearers, farmers and priests between levels of the city. Ritually, climbing was part of the architecture — the ascent itself drew the walker closer to the hanan pacha, the upper world of Inca cosmology.

Walk the staircases today and the sequence still reads: fountains fed by hidden channels along one line, carved outcrops along another, lookouts that open onto the Urubamba gorge far below. The stones are polished smooth in places and the gradient steep; grippy shoes help.

Peruways runs guided climbs with local guides who read the stonework in context — the quarries, the solstice alignments, the fit of blocks that have held through five centuries of earthquakes.