There are so many things to discover for the traveller who wants to visit the 28 countries that are members of the EU. Travelling between these countries has become much easier since the creation of the so-called 'Schengen Area'.
You can cross most borders within the EU without passing through any immigration procedures. Tourists with a valid Brazilian passport can travel freely within the Schengen Area without a visa for a period of up to 90 days. That means that you can enter and leave 25 Schengen countries without internal border controls. A passport is still required for crossing borders between Schengen and the few non-Schengen countries: UK, Ireland, Bulgaria, Romania, Cyprus and Croatia. It is also important to know that Iceland, Norway and Switzerland are also members of the Schengen Area, even though they are not EU members.
Please keep in mind that even within the Schengen Area you should always keep your passport with you, as you might need it in case of a random identification check or security controls.
You should also know that 18 of the 28 member countries use the euro, the common currency of the euro zone, which saves time and money, because there is no need to exchange currencies every time you go to another EU country.
To get more information about travelling to and within the EU, visit the EU travel information site
Have a nice trip!