This tree has witnessed nearly 1,000 years of history.

At the most northwestern point of the contiguous United States lies a trail leading through an ancient forest to stunning cliff-side vistas and massive oceanside caves.

Stroll through a wonderland of stupendous moss-covered trees.

Sleep beneath the big screen at this old-school movie theater.

A Christian retreat founded to welcome refugees fleeing from the Nazis during World War II.

One of the most powerful religious centers in the Middle Ages, dubbed the founder of Western monasticism.

This church sits upon a peaceful hill and a long, turbulent history.

This fortress in Honduras was built to resist pirates, but its builders had more to fear from the British.

This sandstone mansion was the home of two of Oregon's most important pioneers.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

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.