An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

The oldest operating pharmacy in the world features 800-year-old recipes.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

At least seven hues of blue and turquoise make this freshwater lagoon unique.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

A dangling church built over a Colombian gorge.

An elaborate shrine dedicated to the four corners of the world unfortunately misses its mark.

Legend says if this neo-Gothic basilica is ever officially completed, the world will come to an end.

It took 160 years to complete the most ornate church in Ecuador.

The world's tallest aluminum statue is also the world's tallest image of a winged Virgin Mary.

A swing to dangle you off the very edge.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

Huge stone depressions which may have acted as an Incan agricultural experiment.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

The bombed out remains of the old church were kept intact next to the new one, as a reminder of the futility of war.

A preserved block of timber buildings from the city's industrial era in the Middle Ages.