At home they stay locked up in our safe....it's not a snatch and grab model, it's built into the house foundation. Traveling out of the US we carry them in front pockets. When we cruise, especially in Europe, the cruise lines take your passport and keep them for the duration. And before anybody says "I'd never let them take mine!", it's very simple for them, they simply don't let you on the ship so you keep to have your passport in hand as they sail away with you standing on the dock.