British adventurer（冒险家） Alastair Humphreys had ridden his bike around the world，walked cross India，and rowed （划船）from Africa to South America.In 2011，however，Humphreys had some of the biggest adventurers of his life﹣and he never even left the United Kingdom.
For a year，Humphreys went on microadventures ﹣ small，low﹣cost trips close to home.Why did he do this？ "I started to think that it was possible to have an adventure anywhere." He explains.For his first trip，he went hiking with a friend around the M25﹣a 188﹣kilometre road that goes all the way around London.Other adventures included swimming in the River Thames，sleeping outside on a hill，and going on a mountain biking trip.Humphreys learned something important from his microadventures：We find adventures when we try something new.
Humphreys wanted other people to make this discovery，too，so he decided to share his idea.He challenged people to go on microadventures and send him four﹣minute videos of their trips.He asked them to do things like climb a hill，go away for a weekend，or choose a random （任意的）place on a map and go there.People from all over the world accepted his challenge and posted their videos on Twitter.
①Walk across India.
②Sleep outside on a hill.
③Go away for a weekend.
④Swim in the River Thames.
⑤Row from Africa to South America.
⑥Hike around the road around London.
