More than 3.5 million border crossing records from Mexico to the United States have been posted at Ancestry.com. This new collection features an index and digital images of border crossing records created for aliens and some U.S. citizens crossing into the United States at 24 land ports of entry from California to Texas, and provides an important resource for anyone who immigrated to the United States from Mexico. The records contain many insightful clues into a family’s past, such as names and birthdates of travelers, names of friends or family in Mexico or the United States, as well as some signatures. Some even include passport-type photos.