Tens of thousands of tiny birds swarm into one school chimney every fall.

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

Is this the most Portland place ever?

This quiet park's strange sedimentary spires were named after Kodak's color film.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

A wealth of pop culture statuary and green chile dishes give this roadside restaurant clout.

This popular pilgrimage site offers a hole filled with holy healing dirt.

A clear blue swimming hole with hidden caves, still unexplored.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

This set of three large, volcanic hot springs is a favorite haunt for intrepid divers.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

An improbable waterfall springs from an orange-white cliff face, tumbling into the headwaters of the Virgin River above Zion National Park.

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.