Strictly speaking, “travel photography” could be defined as the documentation of an area's landscape, scope and sphere of activity, but I don't think that definition really tells the tale.To photographers, travel photography involves telling the story of an area through photographs which speak about its physical landscape, its cities and towns, its outposts and their history, people, and culture, but there are more elements of travel photography.
Travel encompasses both the human-made and natural worlds. So, in addition to the human-made world, travel photography includes telling the story of the natural world and it's physical landscape, history, its denizens and their way of life.
There is still one more, often forgotten element of travel photography.
Garden tourism draws millions, across the world each year. Australia's National Botanic Gardens attract 400,000 visitors per year while Britain's gardens attract more than 16 million garden enthusiasts every year. In the U.S., Longwood Gardens, in the suburbs of Philadelphia, welcomes more than a million visitors each year.