Vibrant street art created with mixed media.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

Saint Joseph was said to heal the deaf and blind, but it was a much smaller miracle that got him canonized.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

This 19th-century fountain's namesake animal isn't what you think it is.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Long tunnels run under the ancient chariot racing circuit to the tower.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

A medieval village holds a very modern hotel.

The eclectic observatory castle of a 19th-century astronomer and explorer.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Abandoned Nazi train station turned underground astroparticle laboratory.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

A statue honors the children who fought Nazis in Poland.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

Stalactites and stalagmites in a beautifully lit cave.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

Breathtaking and huge 430 year old maps of Italy.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.