MikeLigalig.com

Nestled in the mountains of the Sierra de Guanajuato lies the beautiful colonial city of Guanajuato. The city was founded in 1554 next to one of the richest silver mining areas of Mexico. The 16th-century mining boom led to the construction of beautiful haciendas and fine colonial buildings.

Guanajuato streets and many colorful alleyways spread out in every direction while most of its traffic is served by a network of underground tunnels making it an excellent city for pedestrians.

More at: http://co-paste.blogspot.com/2011/03/top-11-most-colorful-city-around-world.html