Would it be acceptable - and perhaps beneficial - to list some of my cool travel experiences, say, to Istanbul, Norway, Moscow, on my resume? I'm job searching now in New York and wonder whether that could communicate to hiring managers that I perhaps have an open mind and a somewhat broader perspective. I was thinking of using one line on my resume to list some countries.
In a word, no.
Employers aren't interested in travel unless it has to do with your work history. In fact, they're not interested in much of anything unless it pertains to your work history or directly how it will help you on the job.
Leave it off
That's what the interview is for.
Make it interesting. Talk about your passions and your long terms plans and all the awesome stuff in your life then. The resume should only contain the bare minimum content to get you through to the interview. Show them the good stuff and nothing more.
Caution: I say this from experience, that if you're relying more on your resume and not your skill-set to get you through the interview process, then I'm afraid you have some real solid preparation to do.
Unless the experience is directly relevent to the job in question of course!
As a hiring manager if I see someone's extensive travel history listed on their CV it would definitely put me off. Especially if it is regular and/or relatively recent as this positively *screams" that the candidate is just looking for a job to work at for a while so they can fund their next "adventure". In the case of travel that is further in the past then I tend to think they are either desperate to sound "interesting" or trying to "stand out", or worse - they are the sort of person that will never shut up about their "life changing" year backpacking round Asia when they were 19. Ugh!
It's not guaranteed to help, but it can. It cannot hurt either, so you might as well leave it in.
True story, years ago I travelled for about a year. My first job after that came about because the hiring manager loved Thailand, he'd been there on his honeymoon.
My interview with him was just an hour long discussion on diving and beaches. This was for a tech job, in banking, in San Fran, which is the last place you'd think would care.
The only reason we started on the topic was that, at the bottom of my CV, was a section "countries I've travelled to".
I would always leave in anything that makes the fact that you're interesting stand out. I still keep in cool things like chernobyl or working on an elephant orphanage, and more normal spots like angkor wat, & machu picchu now.