Last night "Travel" was drawn as the topic for Round 3. This led to some discussion as to what would constitute a travel photograph, so I decided to do a bit of browsing …
Wikipedia quotes the Photographic Society of America: "a travel photo is an image that expresses the feeling of a time and place, portrays a land, its people, or a culture in its natural state, and has no geographical limitations". National Geographic has a page of travel photography tips, which may help but they do assume you have travelled before making your images, whereas for the PSA's definition you don't actually need to go abroad, nor even to Belfast – you could take pictures in Dublin Street that express the feeling of time and place. I'll pass the PSA definition on to the judge.
You could spend many hours on the internet looking at travel photographs, but if you have only time for a few, take a look at these 10 in the Guardian Newspaper's October Travel competition, with a sub-theme "Faces".