History buffs will have a hard time passing up a chance to visit Mohenjo-Daro in Sindh, an archaeological site dating back to 2500 BCE. An extensive study and excavation of the area led to the conclusion that the mounds and ruins were once a part of the Indus Valley Civilisation, a contemporary of Ancient Egypt and Mesopotamia. Among other things, Mohenjo-Daro was built according to a grid plan, boasted an efficient water management system, and featured public baths – all of this is considered advanced urban planning and civil engineering well ahead of its time.
The city was eventually abandoned around 1900 BCE for obscure reasons and was not rediscovered until the 1920s. Detailed excavation continued until 1966, after which all in-depth archaeological work was halted due to damage inflicted by the weather. Mohenjo-Daro was declared a UNESCO World Heritage Site in 1980 and can be visited via private transport, public bus, or weekly flights from Karachi.