Page not found (404)

Request Method:	GET
Request URL:	http://lapapeleta.cu/activities/coloquio-tras-los-pasos-de-marti/?a=a&region=isla-de-la-juventud
Raised by:	lapapeleta.billboard.views.activities.ActivityDetail

You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.