Depends where you are visiting from. From some countries you don't need a visa to get in if you are going for the regular amount of time slotted for 'tourists' (which might be three months).
do danish citizens need a visa to visit Saipan Nothern Marianas
No. If you've got a United Arab Emirates passport you don't need a visa to visit the US.
yes but it has to be an American visa.
no
No you can get visa only once. Till your visa is valid you can visit multiple times
Visa is not required
No, just a US passport.
No need for a visa, as the UK is a participant in the Visa Waiver Program.
If you are just going to visit him in the US, all you need is a visit visa (tourist visa) but if you are planning on making your home permanently there with him, he needs to apply for a K-3 spousal visa for you.
No, a visa is not necessary, as Japan is in the visa waiver program, but that would require an ESTA from you.
Yes, US citizens need a Visa to enter and exit Costa Rica.
No. U.S. citizens can visit and stay in Hungary for up to 3 months without a visa.