Does Travel Broaden the Mind?

I imagine everybody's familiar with the idea that travel broadens the mind - I often wonder if it was a saying coined by a travel agent!! I wouldn't necessarily disagree with the theory, because I'm sure that travel may broaden the mind - but only if the mind is open to be being broadened.

Could it be a classic case of putting the cart before the horse, or seeing a causal relationship where there is simply a correlation or even coincidence? Undoubtedly, experiencing other cultures, witnessing different ways of living, learning about other religions and beliefs, are opportunities for us to re-examine our own views and perceptions - but do we have to travel for that to happen? And more importantly, perhaps those who have a desire to know how the other half lives are more likely to want to travel and encounter those things for themselves, first hand, they're actually seeking that new point of view as part of their travelling.

On the flip side, what about those who travel extensively but barely leave their comfort zone when they arrive in a foreign land? Eating the same foods as at home, speaking their native tongue, staying only where others think, feel and behave in the same way and speak the same language - in other words, just moving their usual life to a warmer, drier climate (and quite possibly moaning about the locals and their habits at the same time!). Or others who immerse themselves in the whole, foreign experience with gusto, then return home and forget about most of it, in particular how it may relate directly to the customs and mores of others living in their hometown.

So, yes, travel CAN broaden the mind, but those who travel are not necessarily broad-minded, and those who don't are not necessarily the reverse.