Two massive rock outcroppings on the Oregon coastline.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

A volcanic fissure over two miles long and up to 70 feet deep.

Massive crater in central Oregon.

The longest continuous lava tube in Oregon.

The only diamond mine in the world where you can keep what you find.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

A well-worn marker in a forgotten alleyway is all that remains of what had been one of Manhattan's most beautiful buildings.

Perhaps the most beautiful of preserved saints, with a little help from Paris.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

Ancient human, animal, and geometric figures drawn in the earth.

Massive prehistoric mammals used these stones as oversized scratching posts.

An extensive collection of ancient Egyptian artifacts and mummies.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

A mountain range on an active U.S. Navy base hides thousands of mysterious prehistoric rock carvings.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

One family's environment-friendly hobbit-house in Wales.

A statue honoring 44 continuous years of greeting passing ships.

The "last unrestored grand mansion of Savannah" is now a cramped, mouldering maze of antiques.

This haunting tombstone comes complete with a heartbreaking story of love and loss.

More than a century after her death, Little Gracie Watson remains one of Savannah's most often-visited residents.

Standing for over 200 years, the abandoned home of a Revolutionary War hero and later a succession of prison superintendents.