There's a certain level of perspective than cannot change unless you change your surroundings.
The question is too broad though... Some people buy floating condo's with all the comforts of home, sail around the world visiting all the places everyone else visits, and come back exactly the same without gaining any new insights on life or the world around them. They're just on an extended vacation
... Others, cross a single
ocean, and within the weeks of solitude and openness, "find" themselves, and it changes them in profound ways...(they usually write books
A lot of people change their location and sit and wait for their perspective to change, and when it doesn't they say "see, I was right all along".... But to change your perspective (on life, the universe, and everything...) You must first desire
a new perspective. You have to SEEK it out.
This is where you have to differentiate between Running Away
from something, and Seeking
something new. If you are looking for a new perspective on life, or to "find yourself" you will... There's a lot of ways to find yourself, but almost all of them (that I've heard of) involve both travel, and getting outside you're comfort zone while you do it... So in that respect, setting sail across oceans and into different cultures is an ideal method of accomplishing this.