This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

It took 82 years and four different plaques to finally get the story right.

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

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

With nearly double the depth of the Grand Canyon, this Peruvian canyon is one of the deepest in the world.

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

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

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

A Christian monastery stands on what was once a holy Incan temple.

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

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

This 16th-century monastery was founded to cloister the daughters of wealthy local families.

Visiting dignitaries and Hollywood stars once stayed at this 1920s hotel, alongside ghosts that are said to haunt its corridors.

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

Rows of stone statues are dressed up to mourn children that are lost before birth.

This abandoned Greek island was the last active leper colony in Europe.

This stone tower was built to protect Crete from incoming pirates.

An Austrian house of bones filled with hundreds of intricately painted skulls.

These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

A contemporary art installation housed within a Gothic cathedral.