hello, i am wondering about the exact rules on an american traveling to europe. here is the situation: i spent june 2nd-july 18 2013 in greece and would like to return on oct 1, am i ok to return that soon? or do i need to wait 90 days before i can fly back? and once i do i have only 90 days to stay i understand before i must leave for another 90. also, just to be clear i must fly with a roundtrip ticket (i think one way ticket the officials will ask to see proof of finances that i can support myself?) i apprciate any feedback and i will have more questions, as this is very confusing sometimes. thank you in advance! oh also- i think i know the answer to this but to make sure: the visa is not a piece of paper really its just a big stamp in your passport you get when you enter that says you can stay until a certain day and month? so i wouldnt have to go to any consulate before my trip.. ok thanks!