Tarragona is a city in Catalonia, Spain located 100km south of Barcelona. It has over 131,000 inhabitants and is known for its well-preserved Roman ruins from when it served as an important Roman settlement. Tourism is a large part of Tarragona's economy as many visitors come each year to see landmarks like the Roman aqueduct, amphitheater, and walls. The city also has many festivals celebrating both religious and cultural events in Catalonia.