A beautiful 62-acre Catholic shrine and botanical garden.

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

This famous bridge twisted itself into oblivion, but not for the reason you might think.

Native American burial mounds? Giant gopher dens? No one knows what created the Mima Mounds.

At 207 feet, one of the world's longest continuous escalators.

The largest earthwork effigy in the world.

This ominously named New Jersey street seems to be attracting over-the-top legends of its own making.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

The library of every book lover's dreams.

Golden plates containing what would become the Book of Mormon were believed to be buried on this New York hillside.

Twice a day, the water of the Petitcodiac River flows upstream in a surfable wave.

These powerful, if squat, Canadian waterfalls flow in different directions depending on the time of day.

An ancient Viking village in North America that predates Columbus by 500 years.

The ancient latrines of the Greeks, in all their public glory.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

5,000 skulls in memorial to those killed by the Khmer Rouge.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

Khmer Rouge's high security prison.

Giant pagoda houses the car that drove Thích Quảng Đức to his death by self-immolation.

Ha Long Bay's "Cave of Surprises" houses a popular phallic rock formation.

Climb to the top of the world's largest seated bronze Buddha.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.