> Even with Schengen, you'd want to have a passport when traveling within the EU.
No. Your ID card is enough. You don't need a passport to do something like board a flight within the Schengen zone.
No. Your ID card is enough. You don't need a passport to do something like board a flight within the Schengen zone.
Edit: except Denmark, Iceland and Ireland it seems.
Further edit: OK, so id cards are not compulsory in all EU countries, so I withdraw my comment.
It's not compulsory to have one in Finland.
A funny side effect, similar to the US I believe, is that you need a driving license to buy booze.
There may be some variation by state but you typically need a government-issued photo ID (Added: If they check, most places don't if you're obviously old enough.). Which often means a driver's license but can mean a state ID that you get instead of a driver's license. In theory you can probably use a passport/Global entry card/etc. But the more unusual ID you try to present, the greater the chance some store clerk won't accept it.