Automatic Revalidation of Status
If you want to visit Canada, Mexico, or the Caribbean for less than 30 days and are not a citizen of the country you intend to visit, you may travel there even with an expired visa, but you must be certain that the I-94 card is not removed from your passport before leaving the U.S.
You must take the following documents:
You may need to obtain a tourist visa to enter these countries depending on your nationality. Information concerning tourist visas (and which nationalities are required to obtain visas) can be obtained by calling the consulate general of the country you wish to visit. All required information will be explained on a recording. If a tourist visa is required, go in person to the consulate to make the application. Be sure to give yourself sufficient time before your trip to obtain the visa.
Travel to a third country is not permitted with automatic revalidation.