Lunokhod 1
It was lost for almost 40 years, but the space rocket which delivered the rover to the Moon was found in photos taken by the NASA Lunar Reconnaissance Orbiter. Scientists were then able to follow the rover's tracks and found the rover about 10 km away.  They can now send laser beams to a reflector on the rover which will send them back to Earth. This will help them with measurements to find the exact centre of the Moon.