Curitiba, Brazil is known as one of the most socially conscious and advanced cities in Latin America. One of its pioneering claims to fame is its famous bus network, which has now been replicated in numerous other cities. It is a low cost, efficient, mass transit solution that has been copied by other cities.
Most incredible planned city I have ever traveled to. Administrative capital of Malaysia. This is what I imagine a futuristic Star Trek like city might look like. Blend of Modern Western and Classical Islamic architecture amongst lush greenery.
Rode a boat down the Ganges, the holiest river in Hinduism Nat'l Geographic Taboo Season One - Death Episode has good insights and video from Varanasi
I consider Nara a unique city because it is one of the few large towns that I have been to which harmonizes itself so well with its surroundings.
Rose to fame as a center for service outsourcing.