As an approved photographer on stock libraries, you can possibly get access to client briefs where you can submit your work direct to the client, meaning they’ll consider you for the project and see your profile. Otherwise there’s usually a marketplace type system for you to upload your images and have them added to collections based on themes, destinations and seasons.
Some libraries already have enough travel shots, but the big online stock libraries are always looking for fresh images, and want to offer as much as variety as possible. So, if you want to submit to a particular library, check you have a good range of high-quality images that are different from the library’s current selection (and as good as, or better!). Libraries will also take a cut of the money you make from selling your images, typically 50%. 

Devansh Jhaveri is a freelance photographer based in Ahmedabad, India. He has been published in newspapers across India, and his photographs were used as book covers for books by Penguin Books. He has been widely exhibited by Pix Delhi, at the Delhi Photo Festival, the Chennai Salon, and the Asahi Shimbun in Japan. He has also been part of two personal solo shows named Trespass and Distortions. His latest series "The Red Dress Project" was exhibited at the British Council Delhi and will be traveling to other cities this year.
As travel has become more accessible, more and more, the genre is opening up to amateurs and professionals alike. Amateur Travel photography is often shared through sites like Flickr, 500px and 1x. Travel photography, unlike other genres like fashion, product, or food photography, is still an underestimated and relatively less monetized genre, though the challenges faced by travel photographers are lot greater than some of the genres where the light and other shooting conditions may be controllable. Traditionally travel photographers earned money through Stock photography, magazine assignments and commercial projects. Nowadays, the stock photography market has collapsed and more and more photographers are using more innovative methods of earning a living such as through blogging, public speaking, commercial projects and teaching.
This year and I signed a long-term travel photography contract with Cape Town Tourism, the official tourism board in my favorite city in Africa. Meanwhile, I've sold tens of thousands of image licenses through multiple agencies over the years, host local workshops and photowalks in the cities I visit, and I'm constantly working on partnership and sponsorship deals behind-the-scenes. Even my travel photography website works hard for me, as I often get offers and inquiries directly from visitors.
As with all types of photography, smart business sense is key. There are many ways to make a living with travel photography, and much of it extends well beyond your photo gear into social media marketing, content development, negotiation and sales. But the first step is to get out into the world and shoot. Start with anyplace you've been dreaming of traveling, and go! Plan ahead, do some research, and don't shoot like a tourist. Can't afford to travel? Search for opportunities in your nearest city to begin building your portfolio.
Oh gosh, that's 36 hours in the air, Hans? Ouch!! I'm counting total transit time -- for example, a flight I almost booked from Amsterdam to Cape Town had a 2 hour hop to Vienna with an 11 hour layover, followed by a 6.5 hour flight to Ethiopia with a 17 hour layover, followed by a 9 hour flight to Cape Town. Total transit = 45+ hours. Pretty rough!
The third image is of Jinru Lee; a student and part-time model in Georgetown (Penang Island, Malaysia). It was made in late August 2018 under the sweltering sun of Penang, and inside the Cheah Kongsi Clan House Temple on Lebuh Armenian. I was in Penang to photograph the various Hokkien operas during the Hungry Ghost festival, and took the opportunity to set a photo shoot in its streets for a forthcoming audio slideshow (aka photo film) titled "The Phantom of the Opera". 
rove, stray, roam, vagabond, wander, swan, ramble, range, drift, tramp, cast, roll - move about aimlessly or without any destination, often in search of food or employment; "The gypsies roamed the woods"; "roving vagabonds"; "the wandering Jew"; "The cattle roam across the prairie"; "the laborers drift from one town to the next"; "They rolled from town to town"
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