The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A life-sized imperial army, buried in battle formation, has stood underground for over 2,000 years—built not for war, but for eternity.

Although resembling a grand Buddhist temple, this structure is actually the largest mosque in China.

An ancient fortification lives on in this Chinese city.

This square in downtown Eugene is dedicated to the novelist and countercultural figure Ken Kesey.

Spectacular volcanic cliffs along the Crooked River invite hiking, rock climbing, and photography.

An attractive free-plunge waterfall outside Bend in the Deschutes National Forest.

A public fountain that spouts "health water" from a nearby spring.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

Despite a legend that says this highest peak in Oregon was climbed in high heels, scores of people have died on its slopes.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

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

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

A blooming house of worship for the masses.

When the USA donated cement and funds to expand the airport in Laos, the Laotians built a massive monument instead.

More than 200 statues filled with cryptic symbols give this park spot an aura of horror vacui fantasy.

The lavish temple of the Cao Dai religion that includes Buddha, Mohammed, Joan of Arc, and Victor Hugo.

One of Vietnam's most iconic landmarks was built by Japanese traders and is now in danger of sinking.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

Ho Chi Minh's perfectly preserved body has been on display here since 1975.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

This bridge made famous in a novel and on-screen wasn't actually built over the river Kwai.

Buddha shrines hide within dark tunnels at this unique forest temple.