Population: 40,491,051

Passport/Visa Requirements: Passport needed by citizens of the U.S. and Canada. A tourist visa is not required for a visit of up to three months.

Predominant Religion: Christian (Roman Catholic)

Languages: Castilian Spanish (official), Catalan, Gallego, Basque, local dialects.

Time Zone: 1 hour ahead of Greenwich Mean Time (+1 GMT).

Voltage Requirements: 220 volts. 50 Hz.

Telephone Codes: 34, country code; 91, city code for Madrid; 93, city code for Barcelona.