Person can walk through whole world 

The average person walks the equivalent of three times around the world in a lifetime. The average moderately active person takes around 7,500 steps/day. If you maintain that daily average and live until 80 years of age, you’ll have walked about 216,262,500 steps in your lifetime. 

Source: https://allthatsinteresting.com/interesting-facts-about-the-world#36