On Jeff Greenwald's first trip to Asia in 1979, he designed urban playgrounds for UNICEF and the Nepal Children’s Organization. Arriving several months later in Thailand during the Khmer civil war, he served as a volunteer water engineer at Khao-I-Dang—-the largest of the Cambodian refugee camps. These early travel experiences shaped his career and philosophy about travel. In the Spring of 1983, Greenwald was awarded a journalism fellowship by the Rotary International Foundation, and departed for a second trip to Asia. Over the course of 16 months he lived in Kathmandu, Nepal, and made excursions to the Himalaya, India, Sri Lanka, Hong Kong, Japan, Java, and Bali. His articles about those trips appeared in the magazines GEO and Islands. It was around this time that he began writing "Mr. Raja¹s Neighborhood: Letters from Nepal." Four years later, his travels in Nepal and Tibet would inspire "Shopping for Buddhas," first published by Harper and Row in 1990. A later edition, published in the Lonely Planet "Journeys" series, won the Lowell Thomas Gold Award for Best Travel Book of 1996. A 25th Anniversary edition, which includes Nepal's political upheavals since 1995, was added. 
As he circled the globe writing The Size of the World in 1993-1994, Greenwald posted a series of real-time dispatches to GNN, the Global Network Navigator, describing his journey. The first was posted on January 6th, 1994, from Oaxaca, Mexico. Nineteen more followed. Consequently, Greenwald is hailed as an internet pioneer for creating the first international blog (before the term was coined). In 2003, Jeff Greenwald co-founded the organization Ethical Traveler, of which he serves as the Executive Director. A project of the Earth Island Institute, Ethical Traveler is a global community dedicated to exploring the ambassadorial potential of world travel, as outlined in Greenwald's "Thirteen Tips for the Accidental Ambassador."
Using his many travel adventures as material, Greenwald also developed a one-man show in 2003 called "Strange Travel Suggestions." The show, which premiered at The Marsh in San Francisco, is an improvised monologue whose content is determined by the spin of an on-stage "wheel of fortune".
- Mr. Raja’s Neighborhood: Letters from Nepal (1986, John Daniel Publications)
- Shopping for Buddhas (1990, Harper & Row; 1996, Lonely Planet; 2014, Travelers' Tales)
- The Size of the World (1996, Globe Pequot; March 1997, Ballantine Books)
- Future Perfect: How Star Trek Conquered Planet Earth (1998, Viking; 1999, Penguin; 2016, Kindle)
- Scratching the Surface: Impressions of Planet Earth from Hollywood to Shiraz (2002, Naga Press)
- Snake Lake (2010, Counterpoint Press)
- Greenwald has written stories and essays for such publications as The New York Times Magazine, Wired, National Geographic Adventure, Outside, and Salon.com. His travel writing appears in numerous anthologies, such as The Kindness of Strangers, In Search of Adventure, Salon Wanderlust, and in many volumes of the award-winning Travelers Tales series.
- "For anyone with an appetite for fantastic legends, a thirst for color (especially red), and a general craving for utter theological wonder, Nepal is a case study in all-you-can-eat."
- "We go where we need to go, then try to figure out what we're doing there.”
- "Every time I set off on a journey, I feel like God has thrown me the keys to her car."
- Travel Writers: Jeff Greenwald
- Shapiro, Michael (April 2007). NetTravel: How Travelers Use the Internet. Tuttle Publishing. pp. 185–186. ISBN 1-56592-172-0.
- How to travel ethically Archived 2012-07-12 at Archive.is
- Rhett A., Butler (November 27, 2006). "How to travel ethically: An interview with writer and responsible tourism expert Jeff Greenwald".
- The Savvy Traveler Rundown - Week of October 24, 2003
- Wheeler, Tony; Maureen Wheeler (April 2007). Unlikely Destinations: The Lonely Planet Story. Tuttle Publishing. p. 291. ISBN 0-7946-0523-0.
- Arndt, Gary. "Jeff Greenwald: The World's First Travel Blogger".
- Ethical Traveler: Travel Guidelines
- "Greenwald's well-traveled 'Suggestions' worth visiting | Oakland Tribune | Find Articles at BNET.com".[dead link]
- Jeff Greenwald quotes