Understand
Cuzco is a beautiful city with well preserved colonial architecture, evidence of a rich and complex history. The city itself represents the center of indigenous Quechua culture in the Andes, and by merely walking the streets one sees the layers of history. Spanish colonial buildings erected directly atop Inca walls line the square, while the modern tourist nightlife flourishes in their midst.
The city is surrounded by a number of ruins, the most impressive being Sacsayhuaman, the site of the 1536 battle in which dozens of Pizarro's men charged uphill to battle the forces of the Inca.
Nowadays, Cuzco is known for its indigenous population--often seen on the streets in traditional clothing--and its substantial tourist-fueled night life.
At 3,400 m above sea level, altitude sickness soroche can be a problem. See the Stay healthy section for advice. Altitude sickness tends to sneak up on you and although its symptoms may not be apparent at first, it has the potential to develop into something extremely dangerous.
More information on Cuzco is available from the official Tourist Office:
Directur
Portal Blankets 117 close to the Plaza de Armas.