Tony and Maureen Wheeler, the names behind the popular Lonely Planet travel guides, met back in 1970. The couple has been together ever since—brought together by their mutual love of travel and adventure.

Today, their company has 600 publications and 460 guide books to countries around the world. While Lonely Planet books have all the information you need to be a savvy traveler, Maureen tells Peter there's really only one essential ingredient for a great trip. "All you need is a spirit of adventure and curiosity—a desire to get out there and see it, wherever 'it' is," she says.