My friends and I (all from Germany) are thinking about going to Canada (specifically Toronto) for a day during our stay in the U.S. next year. (we have a flight to and from the U.S.)
Do we need something else besides our passports to cross the border in each direction by land? From what I found we should be able to travel to Canada with just our passports but I think for the way back we need some kind of form?
Thanks in advance for your help.