I have a long stopover in Miami (about 7 hours) en-route to the Caymans and I know I have to clear CBP and Immigration upon arrival. I have two questions though:
1) What do I put as my US address on the Customs Entry form upon arrival at Miami? Is "in transit" an acceptable option?
2) Given that I have 7 hours, is it then possible to leave the airport for a few hours and go to a nearby attraction to kill some time?