An emerald-green grotto just a short trip from Austin.

On the Oregon coast there is a natural hole that seems to be draining the sea.

Most-visited and most-photographed slot canyon in the American Southwest.

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

A giant Troll lurks under one of Seattle's oldest bridges.

Stroll through a wonderland of stupendous moss-covered trees.

The frozen bubbles that form on the icy surface of this Canadian lake contain enough methane to create a small explosion.

The granite head appears to be deep in thought and half buried in the ground.

The half-mile long structure is so impressive, it even shows up on satellite images.

The world's largest dark sky preserve is a Canadian park established to preserve the country's last wood bison.

These hellish-looking cliffs in the Canadian Arctic have been burning for centuries.

Ice roads, deep holes and 3,500 pounds of diamonds.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

The ghostly remains of what was once the world's richest copper mine.

Upside-down trees serve as natural flower pots in this hanging garden of Alaska.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

This whimsical stacked cabin looks like something out of a children's book.

This little Vancouver shack is a temple to all things Hendrix.

This scenic waterfront swimming pool is the longest salt water pool in North America.

A high point in Vancouver kitsch.

Walk in the footsteps of the gods and straddle two tectonic plates.