Pilgrimage site for star-crossed lovers.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

An oversized, oddly designed pedestrian overpass has drawn comparisons to a commode for pachyderms.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

Once used to calculate the various levels around the country.

The tiny Spanish village that long refused to change its outrageously anti-Semitic name.

The camera-toting gargoyle juts out from the exterior of a Gothic cathedral.

This stunning iron gate designed by Modernist architect Antoni Gaudí is filled with mythic symbolism.

This colonial town in Colombia sits around the largest stone paved square in South America.

A dangling church built over a Colombian gorge.

This stone complex marks the urban center of a lost civilization.

Pilgrims each carried a brick to the top of Mount Monserrate to help build this historic sanctuary in Colombia.

Erected in 1803, it is the first astronomical observatory that was built in the Americas.

This Bogotá museum houses the world's largest collection of pre-Columbian gold relics.

A museum built around a bus-sized fossil on the side of the highway.

A statue of a boy looks up at where the famous rival to the Leaning Tower of Pisa once stood.

Sanctuary on a ridge near an ancient shrine to a "Black Madonna" built by the founder of Opus Dei.

This religious complex carved into a cliff is steeped in legends of miraculous stags and the Holy Grail.

12th-century holy complex shares land with a natural park full of heavenly waterfalls and raptors.

An impressive home made of stone, carved more than a century ago.

While you wait to cross the street at a traffic light in Mainz, you might notice that the light is staring back at you.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.