After inventing geometry and physics, Greeks invented history—primarily as a way to document their many inventions. Take a stroll through history with this deal: for $14, you get two general admissions to the Da Vinci Machines exhibit in Denver (up to a $28 value).

On loan from the Museum of Leonardo Da Vinci in Florence, Italy, the Da Vinci Machines exhibit features more than 60 interactive models based on the polymath’s original 500-year-old concepts. Peruse replicas of major inventions, each of which was handcrafted by three generations of Florentine artisans. Check out the air screw, an early ancestor to both the helicopter and the propeller beanie, and learn the secrets behind the mechanical lion, a robotic lion given as a gift to the king of France. Youngsters and adults alike are encouraged to touch the war machines, flying machines, and nautical and hydraulic devices for insight into their functionality, and accompanying explanatory notes, illustrative panels, and computer programs help modern minds obtain further understanding of Da Vinci’s wide-reaching genius and desire to develop the greatest invention of all: a juicer.

Though the Da Vinci Machines exhibit offers discounted tickets for students and children between the ages of 5 and 10, this deal offers the best deal available for most customers.