First of all, I think I would suddenly develop a marital crisis if I lived there!
For some people, a vacation might be just what they need to help their marriage. Think of the couple that's overwhelmed with kids and work and life. They're busy, they're tired, and they haven't had sex in six months. A vacation takes them out of their everyday life and puts them back in touch with the reasons they got married in the first place (and they get to have sex).
A break from your everyday life is good if you're getting bored or in a rut. It might work if someone is going through a midlife crisis.
A vacation might work if you're going through hard times that aren't caused by your relationship. So if your in-laws are driving you crazy or you're worrying about money or illness, a break and a chance to get in touch with each other again might work. You could go back refreshed and ready to endure your problems.
Even a couple that has more serious problems with each other might be able to benefit from a vacation. It might give them the break they need and a reminder that they love each other. Then when they got home, they could attempt to work things out. The vacation wouldn't be enough for those couples, but it might be a good start.
I've talked myself into it - if you're ever seriously considering divorce, take a vacation first. You can still get a divorce afterward.
Meanwhile, the rest of us should remember to take vacations before we get to the point of wanting a divorce!



