Earth :)
No other planet yet.
Men waked on the Moon but that is not a planet.
The most likely next one will be Mars. (Can't wait for the Curiosity rover to get there in August.)
People have walked on only one planet and that's our Earth. The only other place they've been is the Moon, which isn't a planet.
Earth is the only planet that people have ever walked on. The only other body away from Earth that people ever walked on is the Moon, and that has not happened in over 40 years. The nearest planet (Venus) is always more than 100 times farther away than the Moon is. Venus is hot enough to melt spacecraft and cook people, so even if it were possible, we would not send people to land on it. The next nearest planet (Mars) is always more than 140 times farther away than the Moon is.
Plenty of people have walked on the planet Earth but as yet the only place outside of Earth that humans have walked in is the Moon.
As of 2021, only one planet has been walked on by humans, and that is Earth. Astronauts have not yet walked on any other planet in our solar system.
The only planet on which people have walked on Earth. The only world other than Earth where people have walked is the moon, but the moon is not a planet.
Only the Planet Earth have humans walked on.
Only the Earth so far has been walked on. (The Moon isn't a planet.)
It's just the Earth. We are on the third planet from the Sun. No people have been anywhere else except the Moon.
As of now, 12 individuals have walked on the surface of the Moon during NASA's Apollo missions from 1969 to 1972. No human has walked on another planet besides Earth.
As far as we know, the only planet that human beings have walked on is the planet Earth; we have also walked on the moon, but that is a satellite, not a planet.
As of now, the only planet people have walked on is Earth. All other planetary bodies in our solar system, such as the Moon, Mars, Venus, and others, have not been visited by humans on foot. NASA's Apollo missions successfully landed astronauts on the Moon between 1969 and 1972, making it the only celestial body besides Earth that humans have physically explored.
People have walked all the way around the world. In 2007, as part of the Blue Planet Run, a relay team RAN around the world. http://blueplanetrun.org/