There will be plenty of signs with instructions when you arrive inside your airline terminal. Follow the ones that say Llegadas or Arrivals and you will be led to Control de Pasaportes or Passport Control. You will most likely wait in line for a while as immigration officials verify your passport, visa and landing card (which you'll receive and fill out on the plane). Officials may ask a few questions about your stay in Spain. Please take this seriously and offer a calm, friendly demeanor. It is a very bad idea to joke or to say something that is untrue when dealing with the immigration official. After they stamp your passport and examine your visa (if applicable), you'll head for the baggage claim carousel. If your immigration officer does not offer to stamp your passport, please insist on this as the immigration officials inspecting your passport upon program completion will hassle you over the missing entry stamp.
After collecting your luggage, you will notice several Cambios or money exchange stations. The rates offered by these airport exchange booths tends to be very bad, so it is advisable that you visit a nearby ATM machine to withdraw some Euros. After passing through immigration you will need to pass through Customs. Follow the exit signs or Salida out of the luggage claim area to arrive at a Customs official's station. You'll have nothing to declare unless you are carrying goods that exceed the duty free limit.
If you travel on the group flight, and if you booked flights according to the official arrival instructions, you will be met by Arcadia staff at the arrivals area and transported from the airport to the orientation venue. If you are an independent traveler, you'll follow the instructions we'll send you in the final pre-departure email and accompanying Spain Travel Guide on how to get to the orientation venue.