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

This stoic, if derpy, giant stands as a monument to Oregon's statehood and the novelty culture of yesteryear.

The longest continuous lava tube in Oregon.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

This former lieutenant governor's home is brimming with curiosities.

A blast of nostalgia awaits visitors to this miniature indoor raceway.

A giant open-air sculpture made of over 200 full-sized boats.

This boulder with a 200-word legal dedication to God has remained hidden in the woods for over 150 years.

This massive boulder is inscribed with the story of a sensational hostage negotiation dating back to Colonial times.