After I told a friend about wanting to travel to Mexico City, he said I had to check out this place called Coyoacan. This residential neighborhood is where the Frida Kahlo museum is located (look for a blue house) and many present artists live.
I hired a taxi driver for the afternoon (for only $12/hour) and had him drop me off right in front of the museum. I then walked the streets photographing all the colorful residential architecture. This was the major highlight of my entire Mexico City trip! It takes about 20 minutes by car from historic Mexico City, so I would advise hiring a driver and then taking your time strolling the streets. You will find many great boutique stores and cafes in Coyoacan.