Every summer, the travel industry and others release statistics on how many vacation days Americans leave on the table. Foregoing compensation seems silly, yet there are rational reasons people might not want to travel.
It costs money, and while research shows people derive happiness from anticipating their vacations, and we post happier tweets the farther we venture from home, travel stress can quickly quash the bliss. Just ask any of the tens of thousands of people stranded in airports across the globe during Delta's computer system outage.
Image: Flickr user Ellen Munro
