for example here.
In short: Edinburgh used to be no more than a single street with high rise buildings on both sides which extended along the Royal Mile, with a castle propped on a rock which used to be a volcano. 35 000 of both rich and poor lived in the same tenement buildings and the city suffered from poor sanitation, overcrowding, crime and bad smell, hence it was named The Auld Reekie. In the second half of the 18th century it was decided that the city needed a new start and a boost of its economy and New Town was commissioned. At the time it was the biggest urban development of this scale in the world, carefully planned to attract the higher social classes and offer exclusivity and a respite from the overcrowded and non-glamorous Old Town. Auld Reekie was reborn as Athens of the North.
Today New Town remains quite exclusive too and is a host to many art galleries, but it also has a few pockets of family friendly neighbourhoods (such as Stockbridge and Cannonmills) with one of the best cafes and cupcake shops in the city. The Eastern part is more bohemian, with independent art studios, hipster cafes and galleries in Broughton street (including my favourite Edinburgh Printmakers). If you're interested, Alexander McCall Smith writes an episodic novel set in Scotland Street in Edinburgh, which is a grotesque portrayal of Edinburgh stereotypes: a middle class mother from Stockbridge who sends her child to Italian lessons, yoga, saxophone classes and psychotherapy; a painter from Drummond Place who marries an anthropologist and an art student from Marchmont who falls in love with a narcissistic estate agent. I'm a fan of his writing, it's both charming and very funny. Highly recommended if you're looking for some light reading. Anyway, we continued our walk towards Moray Place.