Canyon walls shrouded in ferns.

Storage units with a wartime past.

Hundreds of handmade critters fill this tiny window gallery in the heart of Portland's Alberta Arts District.

A heavenly experience, right here on Terra Firma.

The oldest apple tree in the Pacific Northwest.

A deserted hodgepodge of experimental structures designed by nearby university students.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

A controversial memorial at the place where Captain Cook met his violent end.

These ancient sacred grounds granted amnesty to those who managed to reach them.

Watch the newest land on the planet form before your eyes.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

A once-glowing grotto at the bottom of Waikapalae Wet Cave.

This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

A monument celebrating the idea of reaching inaccessible places.

"We Seceded Where Others Failed."

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

An abandoned vacation home spent a decade taking on legends. It's now taking on water.

When this test site was abandoned, they didn't even bother to take the rocket with them.

A community of collapsing homes more than a mile out from the Florida coast.