The Kennedy Space Center Visitor Complex for some time has had a display in their Explorers Wanted exhibit of various vehicles that could be used for Mars exploration.
Fans of this year's movie The Martian might see some similarities between movie props and these displays.
A NASA Surface Exploration Vehicle design concept. Image source: SpaceKSC.com.
The rover as seen in the film. Image source: 20th Century Fox via Space.com.
A model of the Sojourner rover on display. Image source: SpaceKSC.com.
Mark Watney with the Pathfinder lander and Sojourner rover. Image source: Jet Propulsion Laboratory.