Niche Blogging
What is niche blogging? Niche blogging is focusing a blog on a specific subsection of a popular topic. Travel is a popular topic but way to broad. You would need to narrow this topic down to be able to rank well in the search engines.
I would start by picking a state, then city and perhaps even a segment of travel for that city. For instance if you want a niche blog about Florida you could narrow it down and choose Orlando. This is still to broad but you could focus on Orlando Family Travel. This gives you an idea of how to narrow down your niche.
Choosing your topic is the first step to niche blogging. Doing your research to make sure that there will be enough demand for that topic to allow your blog to make money is the second step.
If you are serious about becoming a niche blogger I highly recommend checking out The Niche Blogger. Amy Bass developed The Niche Blogger as a blueprint for others to learn how to make money blogging. This guide is an all inclusive step by step blueprint that even the most inexperienced beginner can follow. It includes instructions and videos outlining exactly what you need to do. This is the most complete system that I have seen.