Not quite everywhere, but almost. To be specific, you can pay wherever Visa is approved. That's quite a lot of places. So you will get by in your everyday life without any problems using our card. The same applies to withdrawals: wherever you see the Visa logo, you can withdraw cash. And that's pretty much every ATM worldwide.
If in doubt, the Visa ATM Locater will show you the way.
A bonus: if you have a Tomorrow-Zero account, withdrawals in a foreign currency are free of charge.