Well, the concept of traveling to all the new different places is wonderful for sure but once you get down to it... a typical travel goes like this:
You shoot all day and then catch a flight after work. You depart NY in the nighttime, 8 hours later you're in Europe but it's already morning and you have to go directly to a shoot. Sleeping in airplanes is a hard deal to manage for most so you're not exactly rested, may feel ill as well and this tends to put people in bad moods. That's what we call "flying redeye."
You get picked up in a car and taken to the shoot. 90% of the time it's in a studio for numerous reasons. You get right to work. Finish. Because you're so tired from the little amount of sleep and working all of that day or because it's possible very late, you go to your hotel and try to squeeze in as many hours as possible. Then you get picked up extremely early in the morning and taken back to the airport to go back home. Or sometimes they'll just send you back to the airport immediately after the shoot.
Most of the time, the only thing you actually get to see while traveling is what you see from the inside of the car and the different hotel rooms.
On the rare occasion that you do shoot in a scenic on-location set, you can take it in and go "ah, lovely!" and then get crammed back into the van

lol
During fashion weeks it's a little different because you might have the opportunity, if you're not busy which is rare, to wander around and eat at some local places or pop into some shops. But for the majority of models, work kind of takes it's toll on your body and your schedule so much it numbs out the positive experiences and wonders of traveling.
jet-set lifestyle = jet-lag lifestyle