What Countries Require Passports?

If you are traveling by air into or out of the United States then you need a passport for anywhere except Puerto Rico. If you are traveling via cruise ship or land then you can use a passport card if you are coming from Mexico, Canada, Bermuda and the Caribbean. The passport card is less expensive than a passport however, you are limited in use. Basically, if you are going to travel outside of the US get a passport.