Europe
- Belgium – no visa required; can stay up to 90 days
- Austria – no visa required; can stay up to 90 days
- Estonia – no visa required; can stay up to 90 days
- Czech Republic – no visa required; can stay up to 90 days
- Ukraine – no visa required; can stay up to 90 days
Basically if you are from USA, then you can jump all around Europe without worrying about Visas.