Travel and writing go together like passports and visas. Most major newspapers have travel sections, dozens of magazines are devoted to travel, book publishers churn out guidebooks to destinations great and small, and books by authors like Paul Theroux and Peter Mayle have helped to breathe new life into the long-dormant travel narrative or "armchair travel" genre.
This doesn't mean that travel writers are getting rich. (In fact, most aren't.) But it does mean there's a large audience for travel prose. You can reach that audience if you know your subject and can bring it to life through good writing.