I've used London's Gatwick Airport, London's Heathrow Airport and the ones in Dover and in Calais, France. They look like this.... London (Gatwick Airport) 'entering the UK' London (Heathrow Airport) 'entering the UK' Port of Dover 'exiting the UK' Port of Calais (France) 'entering the UK'
I've gone out of the Port of Miami, Port of San Juan, St. Thomas, USVI, Port Canaveral, and the Port of New Orleans (and came back in the same ports). I've gone out through the Atlanta Airport (and come back that way). I've crossed the Mexican border at Big Bend National Park and at Juarez (across from El Paso). No pics. TSA/Customs frowns on that.
Hmm, I never really saw TSA as the exit port, but, now that I think about it, (at the airports I've used), that would make sense.
I went to Google for all the ones I've used... I'm even tempted to show the TSA checks now and call them the ports I've used to exit my country... EDIT **but then I couldn't find any...