I need help! New Grad trying to decide best position for travel nursing.

I will be starting as a new grad in January and trying to decide between several positions. I want to do travel nursing after a year or so of experience and i'm trying to find out what units will be the best at providing experience for traveling. I'm not exactly sure what specialty is in high demand (ICU, med/surg, Cardiac, CCU, etc.) I've been offered positions on all so I don't know which one would help me out the best in the long run for traveling. Any info would be good! Thanks!