This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

This lake’s emerald green waters are a spectacular sight, but it’s not a great place for a swim.

Bolivia's needle-like rock formations.

This red lake 4,000 meters above sea level is home to rare flamingos.

The world’s highest ski resort was deserted after an 18,000-year-old glacier melted away.

Now containing the bones of the actual conquistador, instead of someone else.

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

The large collection of pre-Columbian pottery might make you blush.

An Inca spa, military outpost or maybe… both?

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

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

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

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

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

Of the many Jesuit missions in South America, this complex is one of the best preserved.

The ruins of a pre-Columbian fortress city so secure it held off the Spanish conquistadors for over 20 years.

Constructed on the ruins of a convent, this tower saved countless lives.

This enormous sports car themed amusement park is home to the world’s fastest roller coaster.

In an Emirati park near the Omani border, a reconstructed Bronze Age tomb with impressive reliefs.

The only quarter of the Old City not dedicated to a major world religion.

A "miracle" that seems to produce more holy fistfights than holy revelations.

Reminiscent of a termite mound, this imposing structure is likely an ancient funerary monument.

This volcanic crater lake is renowned for its perfectly round shape, stunning blue-green waters, and unique geological properties.