Like many young people, Jessica wants to travel the globe. Unlike most of them, this 25-year-old is doing it 1 . She and her husband have spent the last two years traveling the world, stopping everywhere from Paris to Singapore. It might sound like one long, expensive 2 , but the couple has an unusual way to make their travel 3  .

They're part of a new form of the 4 economy: an online group of house sitters. Throughout their no-cost stays in 5 homes, they feed pets and water plants in the homeowner's 6 .

It's not all sightseeing. The two travelers carefully 7 their trips, scheduling their days around the pets that are sometimes difficult to 8 . But house sitting also offers a level of 9 they can't find in a hotel. "It's like 10 at a friend's house," Jessica says.

The couple has a high 11 rate in getting accepted as house sitters and they always go beyond the homeowner's 12 . For Jessica, that means 13 plenty of pictures of happy pets, keeping the house 14 and leaving a nice small gift before heading to the next house. "You want to make the homeowner feel that they made the right 15 ," she says.