There has been at least 2 visitors and 1 crash. Well its on wiki...pedia
Landings[edit]
A view of the Apollo 11 landing site at center, facing west, with Maskelyne crater in right foreground
In February 1965, the Ranger 8 spacecraft was deliberately crashed into the Mare Tranquillitatis, after successfully transmitting 7,137 close-range photographs of the Moon in the final 23 minutes of its mission.
Surveyor 5 landed in Mare Tranquillitatis on September 11, 1967, and was the fifth lunar lander of the uncrewed Surveyor program.
Apollo[edit]
This mare was also the landing site for the first crewed landing on the Moon on July 20, 1969, at 20:18 UTC. After astronauts Neil Armstrong and Buzz Aldrin made a smooth touchdown in the Apollo 11 Lunar Module named Eagle, Armstrong told flight controllers on Earth, "Houston, Tranquility Base here. The Eagle has landed." The landing area at 0.8° N, 23.5° E has been designated Statio Tranquillitatis after Armstrong's name for it, and three small craters to the north of the base have been named Aldrin, Collins, and Armstrong in honor of the Apollo 11 crew.
The Apollo 11 landed at 00.67408° North latitude, 23.47297° East longitude.[10][11]
