The 15 best cities in the world, according to travellers

6. Oaxaca, Mexico

Oaxaca is a state in southern Mexico known for its indigenous cultures. Its capital city of the same name is noted for colonial buildings often made of green volcanic stone. In the main square, El Zócalo, stands the baroque Catedral de Oaxaca. Beyond the city, pre-Columbian archaeological sites include Mitla, Yagul and Monte Albán, the Zapotec capital dating to around 500 B.C.