Rancagua (Spanish pronunciation: [raŋˈkaɣwa]) is a city and commune in central Chile and part of the Rancagua conurbation. It is the capital of the Cachapoal Province and of the O'Higgins Region, located 87 km (54 mi) south of the national capital of Santiago. Its first name was Santa Cruz de Triana. In 2012, its population was 232,211. The main economic activities range from mining, tourism, agriculture, timber, food production and services to minor industrial activities. The city also serves as the administrative and legal center of the region.Wikipedia
A place in Chile, Rancagua is an interesting place to visit, given its unique culture, history and character. After your splendid visit to Rancagua, you can proceed to an important near-by city of Santiago. Add Santiago to your vacation plan, it has an interesting bunch of activities to do on your visit like Santa Lucia Hill, Barrio Bellavista, Costanera Center. Also, to reach Rancagua, you'll have to take a flight to Santiago; so its not really a detour. And even if it is, the city is worth paying at least a quick visit. To explore Rancagua, set aside 1 to 2 number of your days. You'll be coming back for more!
Rancagua is an affair to remember, follow this apt itinerary of the place and return home with a bunch of memories.