An artsy hidden staircase leads to breathtaking views of San Francisco.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A huge musical instrument played by the ocean.

The home of the world's first and last remaining "wooly ant."

Remember that scene in the Matrix, when Neo is in the big white room with all the weapons flying by? Well, this is what it would look like if he had wanted trees instead of guns.

Beyond being incredibly fun, not much can be said about the Hole with certitude.

At the base of Steens Mountain resides an otherworldly desert.

Stepping inside this coffee shop is a journey through time.

This hotel has hardly changed in over a century, like a time capsule of old Oregon.

Forever immortalized in concrete, this Simpsons etching was crafted by show creator Matt Groening.

A sprawling cave network created by a lone lava tube.

The unique circular corral belonging to the “Cattle King” of Oregon.

This small, rural pioneer cemetery is full of interesting grave markers.

A bronze replica of half-consumed salt lick honors a quirky town tradition.

This large maar crater in Oregon is the bigger brother to Hole in the Ground.

The victims of a free-floating Japanese bombing during WWII are remembered by this stone monument.

As a show of peace, a Japanese naval pilot gifted his 400-year-old Samurai sword to the Oregon town he bombed.

This great stone guardian of the forest is a relic from the land's volatile volcanic past.

Entering this curiosity shop is like stepping into a mad scientist's lab.

A forensic lab dedicated to fighting crimes against wildlife.

According to legend, you must remain completely silent while passing this man-made mound or suffer the consequences.

Portland had a unique approach to Cold War-era protections.

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

This extinct shield volcano is the lightning rod of the Cascades.