Cusco, Peru: the City You Came From and the City You Go Back To

1,359 m in one ride

Cusco sits at 3,399 m (11,152 ft). Aguas Calientes sits at about 2,040 m. That is a gap of about 1,359 m, our sum from the two elevations, and the train hands you all of it in a single afternoon.

Many travellers feel worse in Cusco than they did in the gorge town below. The pattern is common enough that acclimatising in Cusco before descending to Aguas Calientes, or resting a night after coming back up, is standard advice. Read the fuller picture at Aguas Calientes altitude before you decide how to sequence the trip.

What that means for your last day

If you have a flight out of Alejandro Velasco Astete International Airport, code CUZ, the day after your return, treat the altitude as a real cost. Sleep low the night you come back if your itinerary allows it, or build in the spare night in Cusco instead of the gorge. Headaches and breathlessness on the walk from San Pedro station up into the historic centre are normal at 3,399 m, especially after days at 2,040 m.

Water, a slow pace and no tight connections are the simple fixes. If your body handled the descent badly in reverse, the train can be rerouted or split at Ollantaytambo, which sits lower at 2,792 m and makes a gentler first stop on the way up.

Capital before the conquest

Cusco was founded around 1200 CE as the capital of the Kingdom of Cusco and became the capital of the Inca Empire from the 13th century until 1532. That makes it the political centre of the largest state in pre-Columbian America for roughly two centuries before Francisco Pizarro's forces arrived on 15 November 1533. The Spanish city was reestablished on 23 March 1534, built directly over the Inca one.

The Plaza de Armas and the general shape of the historic centre sit on that colonial overlay, which is why the street pattern reads the way it does. Background only here, since this site does not carry a Cusco sightseeing guide.

Earthquakes That Reshaped the City

Per Wikipedia, Cusco suffered major earthquake damage in 1650 and again in 1950. Both events forced rebuilding on top of the existing Inca foundations, which is part of why so much surviving Inca stonework sits below later colonial and republican-era walls: the lower courses proved more earthquake resistant than what the Spanish built above them, so they were kept and built onto rather than replaced. If you notice a wall that changes character partway up, from massive fitted stone to smaller colonial masonry, that seam is usually a trace of one of these rebuilds.

It is a useful thing to know before you walk the historic centre on a return day, even without a sightseeing itinerary attached.

World Heritage city today

UNESCO inscribed the City of Cusco as a World Heritage Site in 1983, joining the neighbouring sanctuary of Machu Picchu on the list. The 2017 census counted 428,450 residents, so it is a working regional capital, not a museum town. It serves as the transport hub for everything on this site: the airport with code CUZ, the road to Ollantaytambo, and the rail line that ends in the gorge at Aguas Calientes.

When your Aguas Calientes to Machu Picchu morning is done and the return train rolls you back, this is the city that absorbs you.

Recover first, then wander

A spare day after the return train is best spent at low output. The altitude jump means the first hours are for eating, drinking water and walking slowly around the Plaza de Armas and the historic centre, which you can cover on foot without a plan. This site does not publish a Cusco sightseeing list, so treat the city itself as free time rather than a checklist.

Once you are back down in the gorge on a future pass, our own things to do in Aguas Calientes page takes over, and the Aguas Calientes tours hub covers everything bookable there.

Use the buffer day

A buffer day is not idle time, it is insurance. The home facts pack records a fire and rockslide near km 107 on 4 August 2026 that suspended PeruRail and Inca Rail service on the Ollantaytambo to Machu Picchu line, the exact line your return train uses. Rail disruption of that kind strands travellers with same-day connections and spares the ones with a slack day.

See transport strikes and suspensions for how these events work. If you are structuring the whole visit around a buffer, the Machu Picchu 2 day tour and the Aguas Calientes in 2 days pattern both build one in.

The Airport at the End of the Line

Cusco's Alejandro Velasco Astete International Airport, code CUZ, is where most itineraries that started in Cusco also end. Because the airport sits at the same 3,399 m as the rest of the city, a flight scheduled soon after the return train gives you no chance to settle before you are back in the air, which is a second reason a buffer night helps more than it costs. If your next stop is Lima or another lower-altitude city, the descent by air resolves the altitude symptoms faster than staying at height ever would, but that is a decision for the day, not something to plan around in advance.