Traveler's Tales accepts non-fiction travel essays for their numerous anthologies and they seem to like humour! Two of the open submissions at the moment are for Women's Travel Humor and More Travel Humor. They do, however, accept all kinds of travel-related pieces, including the frightening, adventurous and grim. They also seem to be running a '30 Days in...' variety of destinations.
Something to note: I read under their 'submissions' that they might use a submitted piece for their online Editor's Choice section - at no payment, although they would offer 50% off their travel books. Stories published in any of their print books earn $100. Submissions are only through the online intake site which is given on the Traveler's Tales website, along with all other details. Might be worth a closer look for anyone who likes to write about their travels!