Lisbon (Portuguese: Lisboa ) is the capital of Portugal situated on seven hills at the wide mouth of the river Tagus ( Tejo ) where it meets the Atlantic Ocean. With half a million citizens in the city proper and 2.8 million in the Lisbon Region and a thriving mix of Portugal's rich history and vivid contemporary culture, Lisbon enchants travellers with its white bleached limestone buildings, intimate alleyways, and an easy going charm that makes it a popular year round destination.