🍋 From the Notebook

Cusco is a city that operates on two timelines simultaneously. The calendar you arrive with — the one that includes check-in times and tour reservations and altitude sickness remedies — sits on top of a much older chronology that the city itself has not forgotten. Walk far enough from the Plaza de Armas in any direction and you will find Inca stonework still in place under the foundations of Spanish churches, colonial mansions, and contemporary restaurants. The fit of the stones is precise enough to be unnerving. No mortar. No decay. Five hundred years of earthquakes and the joints remain tight.

The reason the Spanish built on top of rather than next to the Inca structures was not aesthetic — it was practical. The Inca masonry was better than anything the colonists could build. The 1650 earthquake that devastated the city's colonial buildings left the Inca foundations standing. The Qorikancha walls, the curved apse of the Temple of the Sun that the Spanish incorporated into Santo Domingo, have not moved perceptibly in five centuries. Sacsayhuamán's stones are so large that the Spanish quarried them for building material for generations and still could not remove them all. What remains is what was too big to take.

One thing worth knowing before you arrive: Cusco sits at 3,400 meters. The air at that altitude contains roughly 30% less oxygen than at sea level. This is not a metaphor or a polite warning — it is a physical reality that will affect your first day regardless of your fitness level. Walk slowly. Drink water. Accept the coca tea that everyone offers. The altitude taxes your body before you have any sense that it is happening, and then you stand up too quickly and the city tilts slightly. Give yourself 48 hours. The ruins will still be there.