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Saint Peter's tomb in St. Peter's Basilica, Rome, Italy

Swiss Guards at Saint Peter's Cathedral in Rome, Italy.

Swiss Guards | Inge Johnsson Photography

St. Peter's Basilica, Italy

Heart of the Catholics - Vaticano

Coliseum Colisée, Rome, Italie (HDR / DRI)

La Sagrada Familia in Barcelona, Spain, is one of Europe's most popular attractions, and it isn't even done yet. The committee in charge of finishing the cathedral, which was started in 1882, says it's thisclose to finishing it. Spanish architect Antoni Gaudi's famous structure, one of the most intricate works of architecture in the world, will be completed in 2026 — 144 years after construction began and just in time for the 100th anniversary of Gaudi's death.

Haystack Rock, Cannon Beach, Oregon; Robert Landau

Fog, Golden Gate Bridge, San Francisco, California, United States,

Bay Bridge - San Francisco, Ca

Painted Ladies in the Haight - San Francisco, Ca

Brooklyn Bridge, New York, USA

San Francisco/North Beach, CA