The longest continuous lava tube in Oregon.

Post office plaque commemorates local resistance to a cult invasion.

Legend says that these tall basalt pillars are the petrified wives of a trickster god.

The world's largest Holstein cow.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

For thousands of years, Native American hunters drove buffalo straight off this cliff in Montana's Yellowstone Country.

These giant metal horses graze on a hilltop near the Montana highway.

High in the Rockies the third largest statue in the U.S. opens her welcoming arms, and lights up the night sky.

Multiple monuments to a grizzled old mutt that survived the landscape of Butte's treacherous Berkeley Pit.

The rocks of a certain area of Butte, Montana give off a musical ring when hit.

A classic carnival ride that was carved to be untouchable.

Between Missoula and Spokane, a family-owned travel center has an unusual museum in the back.

The mayor made the declaration in 2004.

This trail leads to a mine that was used as a sanctuary during the Great Fire of 1910.

A black cottonwood gets a second life as a home for books.

A wild west land agreement was etched right onto this historic Idaho stone.

This playground sculpture of an icon from the past is dedicated to the children of the future.

This inanimate goat created by the "welding nun" has been helping to clean up the city of Spokane for more than 40 years.

The decorations were inspired by an unlikely missing treasure.

Local legend has it that an old, decaying staircase outside this cemetery is haunted by dozens of ghosts.

A giant milk bottle from the 1930s beckons drivers to this diner.

Mine your own precious stones.

This natural marble cave is one of only five national monuments in Oregon.

The world's largest dead polar bear, immortalized by taxidermy and Hunter S. Thompson.