A former railroad trestle over Interstate 90 has been refurbished for non-motorized traffic on the Palouse to Cascades trail.

A narrow fjord-like lake, the third-deepest in the United States, runs for over 50 miles into the Cascades of Washington state.

Ancient pueblos built into the base of a natural canyon wall.

A tunnel with windows, so you don't miss out on the impressive views.

Quite simply the largest tree in the world (by volume).

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Home to over 200,000 artifacts, this museum attempts to guide visitors through the ancient history of Beijing and Imperial China.

These mountain hot springs have seen power struggles, doomed romances, and a generalissimo's attempted escape from mutiny.

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

An ancient fortification lives on in this Chinese city.

First established in 741, this is one of the oldest Taoist temples in China.

The embalmed remains of the communist leader lie within a custom crystal coffin.

This smaller cousin of the Forbidden City has gone from ancestral sacrifice to tourist's whispers.

Thanks to the building of a life-giving reservoir, part of the Great Wall of China is now a dive site.

Why walk on this historical site when you can zoom down instead?

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

The earliest pagoda built in the beautiful Panmen Scenic Area of Suzhou.

The Chinese have long been excellent at the art of copying, but this epic replica takes the biscuit.

Ming Dynasty necropolis raided during the Cultural Revolution.

This Tang Dynasty behemoth is the biggest Buddha in the world.

See the imprints of ancient trees, burned and preserved by lava.

Where the Great Wall of China meets the sea.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

Cross the Continental Divide through an old railroad tunnel, and ride back to the top on a shuttle.