Back when I was in college in Boston, I always loved when the city's gray days began to melt away with the arrival of spring. So I was thrilled to see our latest Free City Guide focuses on Boston, as I definitely think it's one of the best places in the U.S. to explore on the cheap (as a college student, I didn't have choice). You can people watch on Newbury Street, take in a concert at the Half Shell, or stroll the iconic Freedom Trail or the market stalls in Faneuil Hall.