What was one characteristic unique to olmec culture?

One characteristic unique to Olmec culture is that they produced stone heads of colossal size. These were carved in Basalt and all of them display unique facial feature so that they can be considered portraits of actual rulers. The heads can be nearly 3 meters high and 8 tons in weight, and the stone from which they were carved was in some cases transported 80 km or more using huge balsa river rafts.

They also liked to mix animals to create wonderful creatures such as were-jaguars, a cross between a human and a jaguar, which may have been their supreme deity. It is known they also liked to drink chocolate.