The Bicentennial Expo begins tomorrow, July 17th, at 11 a.m. Mexico's President, Felipe Calderón, will inaugurate the expo, which will last until November 20th (the anniversary of the beginning of the Mexican Revolution in 1910.
The park is located between Guanajuato and Silao. There are various exhibits showing Mexico's past, present and future as well as exhibits related to the fight for independence from Spain and the Mexican Revolution.
Here are some web sites with photos and additional information:
http://www.expobicentenario.mx/index.php (in Spanish)
http://www.mexicopremiere.com/?p=2512 (in English)
…about.com/od/…mexico_bicentenial.htm (in English)