Ecuador's first Catholic church was built by Spanish conquistadors in 1534.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

This beautiful spit of land was once the summer playground of the king of Spain.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

Also known as the "Red Taj Mahal."

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

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

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

The remains of what was the most important religious complex in coastal Peru for over a millennium.

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.

Deep in the Guatemalan jungle stands an ancient pyramid that once marked the reign of a king.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

These ruins on Mont Tantané dates back to the Iron Age, but there is limited evidence for why a village was built so far from water or other resources.

A small town lost in the mountains of southern Italy hosts the childhood home of one of the most famous saints of the 20th century.

The sacristy of this church contains remains and relics of members of the Aragonese royal family.

An 18th century fountain and two columns are all that remains of Rome's forgotten river harbor.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

This breathtaking monastery was established by Saint Benedict himself 1,500 years ago.