The Museo de Arte is a fun stop on Querétaro. The building's pretty (I felt like taking photographs…read moreof this more than the art on display), the collection's fun to view, and the staff are friendly.
At the time there was a modern gallery featuring some Rivera works, and a gallery with Spanish Americas-era art.
All told, we were able to walk through the museum in less than an hour. But, the price was free! You can't beat that.