Guanajuato

A funicular took us to the top of a mountain where we saw this spectacular view of the city of Guanajuato. The city center is at the bottom of this basin, and neighborhoods fill the surrounding hills. Underneath the city center are tunnels that were built many years ago to divert traffic away from the city center. 
http://guanajuatomexicocity.com/Guanajuato-guide/guanajuato-tunnels.html