Not-so-fearsome tiny trolls live under this wooden train trestle in Portland.

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

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

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.

Treehouse motel and treehouse-building school.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

This frequently-photographed waterfall takes only a short hike to visit.

This charmingly homemade amusement park has been growing for 40 years.

Hollowed out cedar log tubs set in an ancient towering forest.

The seamy, underground secrets of Portland's criminal past.

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

A novel collection of medical curiosities housed in an 18th-century surgeon training academy.

An enormous, inside-out glass globe built in 1935.

The massive machine creates cracking displays of indoor lightning.