urban centers have existed across the globe for at least 6,000 years

this ancient Mayan city is famed for its impressive sculptured stone lintels above doorways 

a Mayan citadel dating from the 4th century BC until the 9th century AD

Volubilis covered around 100 acres (42 hectares) and was graced by grand houses decorated with exquisite mosaics

The library was destroyed in AD 262 in an earthquake but the fa├žade was rebuilt by archaeologists in the 1970s

 There are gorgeous baths featuring colorful paintings of hunting scenes

Herculaneum on the south-west Italian coast, was also destroyed when Mount Vesuvius erupted in AD 79

For more stories