National Geographic vs National Geographic Travel?

Which should I order, what is the difference. I am more into cultures and other countries. But is the National Geographic about restaurants and commercial places to go to? Or does it show the culture of other countries? What other things are in the original magazine that the Travel one doesn't have? How many times a year does each of the magazines come? Once a month? There's a deal of $ 17.95 for the Travel one which is buy one subscription get the second or the second year free. Is it a good price? Sorry for the stupid questions but I have never subscribed to a magazine before and am just trying to get information and buy the right one for myself. Thanks:)