PayloadBay.com - Opportunity

Opportunity

On January 25, 2004, the rover Opportunity landed successfully on the surface of Mars. A few weeks earlier, the rover's twin, Spirit, landed on the opposite side of the planet.

Opportunity landed in a smooth plain near Mars's equator called the Meridiani Planum.

References:

Mars Exploration Rover (Miscellaneous)
Meridiani Planum (Miscellaneous)
Opportunity landed on Mars on January 25, 2004.
Opportunity Lands on Mars (January 25, 2004) - Opportunity landed on Mars on January 25, 2004.
This image captured by the Mars Exploration Rover Opportunity's rear hazard-avoidance camera shows the lander that carried the rover 283 million miles to Meridiani Planum on Mars. The lander rolled onto the martian soil at 3:01 a.m. PST, on January 31, 2004. (Picture)