Where did the first human take his first step on the moon?

The first human took his first step on the Moon at a site known as the Sea of Tranquility (Mare Tranquillitatis) on July 20, 1969. Astronaut Neil Armstrong, part of NASA's Apollo 11 mission, famously declared, "That's one small step for [a] man, one giant leap for mankind," as he descended from the lunar module and set foot on the lunar surface.