Rome is a sprawling, cosmopolitan city with nearly 3,000 years of globally influential art, architecture and culture on display.

Ancient ruins such as the Forum and the Colosseum evoke the power of the former Roman Empire.

Barcelona, the cosmopolitan capital of Spain's Catalonia region, is known for its art and architecture.

The fantastical Sagrada Família church and other modernist landmarks designed by Antoni Gaudí dot the city.

San Francisco, officially City and County of San Francisco and colloquially known as SF, San Fran or "The City", is the cultural, commercial, and financial center of Northern California.